Let it not be suspected, from any thing that I have delivered, that I

suppose the influence of physical causes upon the moral faculty, renders

the agency of divine influence unnecessary to our moral happiness. I

only maintain, that the operations of the divine government are carried

on in the moral, as in the natural world, by the instrumentality of

second causes. I have only trodden in the footsteps of the inspired

writers; for most of the physical causes I have enumerated, are

connected with moral precepts, or have been used as the means of

reformation from vice, in the Old and New Testaments. To the cases that

have been mentioned, I shall only add, that Nebuchadnezzar was cured of

his pride, by means of solitude and a vegetable diet. Saul was cured

of his evil spirit, by means of David's harp, and St. Paul expressly

says, "I keep my body under, and bring it into subjection, lest that

by any means, when I have preached to others, I myself should be a

cast-away." But I will go one step further, and add in favour of divine

influence upon the moral principle, that in those extraordinary cases,

where bad men are suddenly reformed, without the instrumentality of

physical, moral, or rational causes, I believe that the organization of

those parts of the body, in which the faculties of the mind are seated,

undergoes a physical change[11]; and hence the expression of a "new

creature," which is made use of in the Scriptures to denote this change,

is proper in a literal, as well as a figurative sense. It is probably

the beginning of that perfect renovation of the human body, which is

predicted by St. Paul in the following words: "For our conversation is

in heaven, from whence we look for the Saviour, who shall change our

vile bodies, that they may be fashioned according to his own glorious

body." I shall not pause to defend myself against the charge of

enthusiasm in this place; for the age is at length arrived, so devoutly

wished for by Dr. Cheyne, in which men will not be deterred in their

researches after truth, by the terror of odious or unpopular names.

[11] St. Paul was suddenly transformed from a persecutor into a man

of a gentle and amiable spirit. The manner in which this change

was effected upon his mind, he tells us in the following words:

"Neither circumcision availeth any thing, nor uncircumcision, but

a new creature. From henceforth let no man trouble me; for I bear

in _my body_, the _marks_ of our Lord Jesus." Galatians,

vi. 15, 17.

I cannot help remarking under this head, that if the conditions of

those parts of the human body which are connected with the human soul,

influence morals, the same reason may be given for a virtuous education,

that has been admitted for teaching music and the pronunciation of

foreign languages, in the early and yielding state of those organs which

form the voice and speech. Such is the effect of a moral education,

that we often see its fruits in advanced stages of life, after the

religious principles which were connected with it, have been renounced;

just as we perceive the same care in a surgeon in his attendance upon

patients, after the sympathy which first produced this care, has ceased

to operate upon his mind. The boasted morality of the deists, is, I

believe, in most cases, the offspring of habits, produced originally by

the principles and precepts of christianity. Hence appears the wisdom of

Solomon's advice, "Train up a child in the way he should go, and when he

is old he will not," I had almost said, he cannot "depart from it."

Thus have I enumerated the principal causes which act mechanically upon

morals. If from the combined action of physical powers that are opposed

to each other, the moral faculty should become stationary, or if the

virtue or vice produced by them, should form a neutral quality, composed

of both of them, I hope it will not call in question the truth of our

general propositions. I have only mentioned the effects of physical

causes in a simple state[12].

[12] The doctrine of the influence of physical causes on morals is

happily calculated to beget charity towards the failings of our

fellow-creatures. Our duty to practise this virtue is enforced

by motives drawn from science, as well as from the precepts of

christianity.

It might help to enlarge our ideas upon this subject, to take notice

of the influence of the different stages of society, of agriculture and

commerce, of soil and situation, of the different degrees of cultivation

of taste, and of the intellectual powers, of the different forms of

government, and lastly, of the different professions and occupations

of mankind, upon the moral faculty; but as these act indirectly only,

and by the intervention of causes that are unconnected with matter,

I conceive they are foreign to the business of the present inquiry.

If they should vary the action of the simple physical causes in any

degree, I hope it will not call in question the truth of our general

propositions, any more than the compound action of physical powers, that

are opposed to each other. There remain but a few more causes which are

of a compound nature, but they are so nearly related to those which

are purely mechanical, that I shall beg leave to trespass upon your

patience, by giving them a place in my oration.

The effects of imitation, habit, and association upon morals, would

furnish ample matter for investigation. Considering how much the shape,

texture, and conditions of the human body, influence morals, I submit

it to the consideration of the ingenious, whether, in our endeavours

to imitate moral examples, some advantage may not be derived, from our

copying the features and external manners of the originals. What makes

the success of this experiment probable is, that we generally find men,

whose faces resemble each other, have the same manners and dispositions.

I infer the possibility of success in an attempt to imitate originals in

a manner that has been mentioned, from the facility with which domestics

acquire a resemblance to their masters and mistresses, not only in

manners, but in countenance, in those cases where they are tied to them

by respect and affection. Husbands and wives also, where they possess

the same species of face, under circumstances of mutual attachment,

often acquire a resemblance to each other.

From the general detestation in which hypocrisy is held, both by good

and bad men, the mechanical effects of habit upon virtue have not been

sufficiently explored. There are, I am persuaded, many instances where

virtues have been assumed by accident, or necessity, which have become

real from habit, and afterwards derived their nourishment from the

heart. Hence the propriety of Hamlet's advice to his mother:

"Assume a virtue, if you have it not.

That monster, Custom, who all sense doth eat

Of habits evil, is angel yet in this,

That to the use of actions fair and good

He likewise gives a frock or livery,

That aptly is put on. Refrain to-night,

And that shall lend a kind of easiness

To the next abstinence; the next more easy:

For use can almost change the stamp of nature,

And master even the devil, or throw him out,

With wondrous potency."

The influence of ASSOCIATION upon morals, opens an ample field for

inquiry. It is from this principle, that we explain the reformation from

theft and drunkenness in servants, which we sometimes see produced by a

draught of spirits, in which tartar emetic had been secretly dissolved.

The recollection of the pain and sickness excited by the emetic,

naturally associates itself with the spirits, so as to render them both

equally the objects of aversion. It is by calling in this principle

only, that we can account for the conduct of Moses, in grinding the

golden calf into a powder, and afterwards dissolving it (probably by

means of hepar sulphuris) in water, and compelling the children of

Israel to drink of it, as a punishment for their idolatry. This mixture

is bitter and nauseating in the highest degree. An inclination to

idolatry, therefore, could not be felt without being associated with the

remembrance of this disagreeable mixture, and of course being rejected,

with equal abhorrence. The benefit of corporal punishments, when they

are of a short duration, depends in part upon their being connected,

by time and place, with the crimes for which they are inflicted. Quick

as the thunder follows the lightning, if it were possible, should

punishments follow the crimes, and the advantage of association would

be more certain, if the spot where they were committed, were made the

theatre of their expiation. It is from the effects of this association,

probably, that the change of place and company, produced by exile and

transportation, has so often reclaimed bad men, after moral, rational,

and physical means of reformation had been used to no purpose.

As SENSIBILITY is the avenue to the moral faculty, every thing which

tends to diminish it tends also to injure morals. The Romans owed much

of their corruption to the sights of the contests of their gladiators,

and of criminals, with wild beasts. For these reasons, executions should

never be public. Indeed, I believe there are no public punishments of

any kind, that do not harden the hearts of spectators, and thereby

lessen the natural horror which all crimes at first excite in the human

mind.

CRUELTY to brute animals is another means of destroying moral

sensibility. The ferocity of savages has been ascribed in part to their

peculiar mode of subsistence. Mr. Hogarth points out, in his ingenious

prints, the connection between cruelty to brute animals in youth, and

murder in manhood. The emperor Domitian prepared his mind, by the

amusement of killing flies, for all those bloody crimes which afterwards

disgraced his reign. I am so perfectly satisfied of the truth of a

connection between morals and humanity to brutes, that I shall find it

difficult to restrain my idolatry for that legislature, that shall first

establish a system of laws, to defend them from outrage and oppression.

In order to preserve the vigour of the moral faculty, it is of the

utmost consequence to keep young people as ignorant as possible of those

crimes that are generally thought most disgraceful to human nature.

Suicide, I believe, is often propagated by means of newspapers. For this

reason, I should be glad to see the proceedings of our courts kept from

the public eye, when they expose or punish monstrous vices.

The last mechanical method of promoting morality that I shall mention,

is to keep sensibility alive, by a familiarity with scenes of distress

from poverty and disease. Compassion never awakens in the human bosom,

without being accompanied by a train of sister virtues. Hence the wise

man justly remarks, that "By the sadness of the countenance, the heart

is made better."

A late French writer, in his prediction of events that are to happen

in the year 4000, says, "That mankind in that æra shall be so far

improved by religion and government, that the sick and the dying shall

no longer be thrown, together with the dead, into splendid houses, but

shall be relieved and protected in a connection with their families

and society." For the honour of humanity, an institution[13], destined

for that distant period, has lately been founded in this city, that

shall perpetuate the year 1786 in the history of Pennsylvania. Here

the feeling heart, the tearful eye, and the charitable hand, may

always be connected together, and the flame of sympathy, instead of

being extinguished in taxes, or expiring in a solitary blaze by a

single contribution, may be kept alive, by constant exercise. There

is a necessary connection between animal sympathy, and good morals.

The priest and the Levite, in the New Testament, would probably have

relieved the poor man who fell among thieves, had accident brought them

near enough to his wounds. The unfortunate Mrs. Bellamy was rescued from

the dreadful purpose of drowning herself, by nothing but the distress of

a child, rending the air with its cries for bread. It is probably owing,

in some measure, to the connection between good morals and sympathy that

the fair sex, in every age and country, have been more distinguished

for virtue, than men; for how seldom do we hear of a woman, devoid of

humanity?

[13] A public dispensary.

Lastly, ATTRACTION, COMPOSITION, and DECOMPOSITION, belong to the

passions as well as to matter. Vices of the same species attract each

other with the most force: hence the bad consequences of crowding young

men, whose propensities are generally the same, under one roof, in our

modern plans of education. The effects of composition and decomposition

upon vices, appear in the meanness of the school-boy being often cured

by the prodigality of a military life, and by the precipitation of

avarice, which is often produced by ambition and love.

If physical causes influence morals in the manner we have described, may

they not also influence religious principles and opinions? I answer in

the affirmative; and I have authority, from the records of physic, as

well as from my own observations, to declare, that religious melancholy

and madness, in all their variety of species, yield with more facility

to medicine, than simply to polemical discourses, or to casuistical

advice. But this subject is foreign to the business of the present

inquiry.

From a review of our subject, we are led to contemplate with

admiration, the curious structure of the human mind. How distinct are

the number, and yet how united! How subordinate, and yet how co-equal

are all its faculties! How wonderful is the action of the mind upon the

body! of the body upon the mind! and of the Divine Spirit upon both!

What a mystery is the mind of man to itself!---- O! Nature!---- or, to

speak more properly, O! THOU GOD OF NATURE! in vain do we attempt to

scan THY immensity, or to comprehend THY various modes of existence,

when a single particle of light, issued from THYSELF, and kindled

into intelligence in the bosom of man, thus dazzles and confounds our

understandings!

The extent of the moral powers and habits in man is unknown. It

is not improbable, but the human mind contains principles of virtue,

which have never yet been excited into action. We behold with surprise

the versatility of the human body in the exploits of tumblers and

rope-dancers. Even the agility of a wild beast has been demonstrated

in a girl of France, and an amphibious nature has been discovered in

the human species, in a young man in Spain. We listen with astonishment

to the accounts of the _memories_ of Mithridates, Cyrus, and Servin.

We feel a veneration bordering upon divine homage, in contemplating

the stupenduous _understandings_ of lord Verulam and sir Isaac Newton;

and our eyes grow dim, in attempting to pursue Shakespeare and Milton

in their immeasurable flights of _imagination_. And if the history

of mankind does not furnish similar instances of the versatility and

perfection of our species in virtue, it is because the moral faculty

has been the subject of less culture and fewer experiments than the

body, and the intellectual faculties of the mind. From what has been

said, the reason of this is obvious. Hitherto the cultivation of the

moral faculty has been the business of parents, schoolmasters, and

divines[14]. But if the principles, we have laid down, be just, the

improvement and extension of this principle should be equally the

business of the legislator, the natural philosopher, and the physician;

and a physical regimen should as necessarily accompany a moral

precept, as directions with respect to the air, exercise, and diet,

generally accompany prescriptions for the consumption, and the gout. To

encourage us to undertake experiments for the improvement of morals,

let us recollect the success of philosophy in lessening the number,

and mitigating the violence of incurable diseases. The intermitting

fever, which proved fatal to two of the monarchs of Britain, is now

under absolute subjection to medicine. Continual fevers are much less

fatal than formerly. The small-pox is disarmed of its mortality by

inoculation, and even the tetanus and the cancer have lately received

a check in their ravages upon mankind. But medicine has done more. It

has penetrated the deep and gloomy abyss of death, and acquired fresh

honours in his cold embraces. Witness the many hundred people who have

lately been brought back to life by the successful efforts of the humane

societies, which are now established in many parts of Europe, and in

some parts of America. Should the same industry and ingenuity, which

have produced these triumphs of medicine over diseases and death, be

applied to the moral science, it is highly probable, that most of those

baneful vices, which deform the human breast, and convulse the nations

of the earth, might be banished from the world. I am not so sanguine as

to suppose, that it is possible for man to acquire so much perfection

from science, religion, liberty, and good government, as to cease to

be mortal; but I am fully persuaded, that from the combined action of

causes, which operate at once upon the reason, the moral faculty, the

passions, the senses, the brain, the nerves, the blood, and the heart,

it is possible to produce such a change in his moral character, as shall

raise him to a resemblance of angels; nay, more, to the likeness of GOD

himself. The state of Pennsylvania still deplores the loss of a man, in

whom not only reason and revelation, but many of the physical causes

that have been enumerated, concurred to produce such attainments in

moral excellency, as have seldom appeared in a human being. This amiable

citizen considered his fellow-creature, man, as God's extract, from his

own works; and whether this image of himself was cut out from ebony or

copper; whether he spoke his own, or a foreign language; or whether

he worshipped his Maker with ceremonies, or without them, he still

considered him as a brother, and equally the object of his benevolence.

Poets and historians, who are to live hereafter, to you I commit his

panegyric; and when you hear of a law for abolishing slavery in each

of the American states, such as was passed in Pennsylvania, in the

year 1780; when you hear of the kings and queens of Europe, publishing

edicts for abolishing the trade in human souls; and, lastly, when you

hear of schools and churches, with all the arts of civilized life, being

established among the nations of Africa, then remember and record,

that this revolution in favour of human happiness, was the effect of

the labours, the publications, the private letters, and the prayers of

ANTHONY BENEZET[15].

[14] The people commonly called Quakers and the Methodists, make use of

the greatest number of physical remedies in their religious and

moral discipline, of any sects of Christians; and hence we find

them every where distinguished for their good morals. There are

several excellent _physical_ institutions in other churches; and

if they do not produce the same moral effects that we observe

from physical institutions among those two modern sects, it must

be ascribed to their being more neglected by the members of those

churches.

[15] This worthy man was descended from an ancient and honourable family

that flourished in the court of Louis XIV. With liberal prospects

in life he early devoted himself to teaching an English school;

in which, for industry, capacity, and attention to the morals and

principles of the youth committed to his care, he was without an

equal. He published many excellent tracts against the African

trade, against war, and the use of spiritous liquors, and one in

favour of civilizing and Christianizing the Indians. He wrote

to the queen of Great Britain, and the queen of Portugal, to

use their influence in their respective courts to abolish the

African trade. He also wrote an affectionate letter to the king

of Prussia, to dissuade him from making war. The history of his

life affords a remarkable instance how much it is possible for

an individual to accomplish in the world; and that the most

humble stations do not preclude good men from the most extensive

usefulness. He bequeathed his estate (after the death of his

widow) to the support of a school for the education of negro

children, which he had founded and taught for several years

before he died. He departed this life in May, 1784, in the 71st

year of his age, in the meridian of his usefulness, universally

lamented by persons of all ranks and denominations.

I return from this digression, to address myself in a particular

manner to you, VENERABLE SAGES and FELLOW CITIZENS in the REPUBLIC OF

LETTERS. The influence of philosophy, we have been told, has already

been felt in courts. To increase, and complete this influence, there

is nothing more necessary, than for the numerous literary societies in

Europe and America, to add the SCIENCE OF MORALS to their experiments

and inquiries. The godlike scheme of Henry IV, of France, and of the

illustrious queen Elizabeth, of England, for establishing a perpetual

peace in Europe, may be accomplished without a system of jurisprudence,

by a confederation of learned men, and learned societies. It is in

their power, by multiplying the objects of human reason, to bring the

monarchs and rulers of the world under their subjection, and thereby to

extirpate war, slavery, and capital punishments, from the list of human

evils. Let it not be suspected that I detract, by this declaration,

from the honour of the Christian religion. It is true, Christianity was

propagated without the aid of human learning; but this was one of those

miracles, which was necessary to establish it, and which, by repetition,

would cease to be a miracle. They misrepresent the Christian religion,

who suppose it to be wholly an internal revelation, and addressed

only to the moral faculties of the mind. The truths of Christianity

afford the greatest scope for the human understanding, and they will

become intelligible to us, only in proportion as the human genius is

stretched, by means of philosophy, to its utmost dimensions. Errors may

be opposed to errors; but truths, upon all subjects, mutually support

each other. And perhaps one reason why some parts of the Christian

revelation are still involved in obscurity, may be occasioned by our

imperfect knowledge of the phenomena and laws of nature. The truths of

philosophy and Christianity dwell alike in the mind of the Deity, and

reason and religion are equally the offspring of his goodness. They

must, therefore, stand and fall together. By reason, in the present

instance, I mean the power of judging of truth, as well as the power of

comprehending it. Happy æra! when the divine and the philosopher shall

embrace each other, and unite their labours for the reformation and

happiness of mankind!

ILLUSTRIOUS COUNSELLORS and SENATORS of Pennsylvania[16]! I anticipate

your candid reception of this feeble effort to increase the quantity

of virtue in our republic. It is not my business to remind you of the

immense resources for greatness, which nature and Providence have

bestowed upon our state. Every advantage which France has derived from

being placed in the centre of Europe, and which Britain has derived from

her mixture of nations, Pennsylvania has opened to her. But my business,

at present, is to suggest the means of promoting the happiness, not the

greatness, of the state. For this purpose, it is absolutely necessary

that our government, which unites into one, all the minds of the state,

should possess, in an eminent degree, not only the understanding, the

passions, and the will, but, above all, the moral faculty and the

conscience of an individual. Nothing can be politically right, that

is morally wrong; and no necessity can ever sanctify a law, that is

contrary to equity. VIRTUE is the soul of a republic. To promote this,

laws for the suppression of vice and immorality will be as ineffectual,

as the increase and enlargement of jails. There is but one method of

preventing crimes, and of rendering a republican form of government

durable, and that is, by disseminating the seeds of virtue and knowledge

through every part of the state, by means of proper modes and places of

education, and this can be done effectually only by the interference and

aid of the legislature. I am so deeply impressed with the truth of this

opinion, that were this evening to be the last of my life, I would not

only say to the asylum of my ancestors, and my beloved native country,

with the patriot of Venice, "Esto perpetua," but I would add, as the

last proof of my affection for her, my parting advice to the guardians

of her liberties, "To establish and support PUBLIC SCHOOLS, in every

part of the state."

[16] The president, and supreme executive council, and the members

of the general assembly of Pennsylvania, attended the delivery of

the oration, in the hall of the university, by invitation from

the Philosophical Society.

AN INQUIRY

INTO THE

CAUSES AND CURE

OF THE

_PULMONARY CONSUMPTION_.

In an essay, entitled "Thoughts on the Pulmonary Consumption[17]," I

attempted to show that this disease was the effect of causes which

induced general debility, and that the only hope of discovering a cure

for it should be directed to such remedies as act upon the whole system.

In the following inquiry, I shall endeavour to establish the truth of

each of those opinions, by a detail of facts and reasonings, at which I

only hinted in my former essay.

[17] Vol. I. p. 199.

The method I have chosen for this purpose, is to deliver, and

afterwards to support, a few general propositions.

I shall begin by remarking,

I. That the pulmonary consumption is induced by predisposing debility.

Medical Inquiries and Observations, Vol. 2 The Second Edition, Revised and Enlarged by the Author · 第 2 / 21 段