TO PETER CARR.

PARIS, August 10, 1787.

DEAR PETER,--I have received your two letters of December the 30th and

April the 18th, and am very happy to find by them, as well as by

letters from Mr. Wythe, that you have been so fortunate as to attract

his notice and good will; I am sure you will find this to have been one

of the most fortunate events of your life, as I have ever been sensible

it was of mine. I enclose you a sketch of the sciences to which I would

wish you to apply, in such order as Mr. Wythe shall advise; I mention,

also, the books in them worth your reading, which submit to his

correction. Many of these are among your father's books, which you

should have brought to you. As I do not recollect those of them not in

his library, you must write to me for them, making out a catalogue of

such as you think you shall have occasion for, in eighteen months from

the date of your letter, and consulting Mr. Wythe on the subject. To

this sketch, I will add a few particular observations:

1. Italian. I fear the learning this language will confound your French

and Spanish. Being all of them degenerated dialects of the Latin, they

are apt to mix in conversation. I have never seen a person speaking the

three languages, who did not mix them. It is a delightful language, but

late events having rendered the Spanish more useful, lay it aside to

prosecute that.

2. Spanish. Bestow great attention on this, and endeavor to acquire an

accurate knowledge of it. Our future connections with Spain and Spanish

America, will render that language a valuable acquisition. The ancient

history of that part of America, too, is written in that language. I

send you a dictionary.

3. Moral Philosophy. I think it lost time to attend lectures on this

branch. He who made us would have been a pitiful bungler, if he had

made the rules of our moral conduct a matter of science. For one man of

science, there are thousands who are not. What would have become of

them? Man was destined for society. His morality, therefore, was to be

formed to this object. He was endowed with a sense of right and wrong,

merely relative to this. This sense is as much a part of his nature, as

the sense of hearing, seeing, feeling; it is the true foundation of

morality, and not the [Greek: to kalon], truth, &c., as fanciful

writers have imagined. The moral sense, or conscience, is as much a

part of man as his leg or arm. It is given to all human beings in a

stronger or weaker degree, as force of members is given them in a

greater or less degree. It may be strengthened by exercise, as may any

particular limb of the body. This sense is submitted, indeed, in some

degree, to the guidance of reason; but it is a small stock which is

required for this: even a less one than what we call common sense.

State a moral case to a ploughman and a professor. The former will

decide it as well, and often better than the latter, because he has not

been led astray by artificial rules. In this branch, therefore, read

good books, because they will encourage, as well as direct your

feelings. The writings of Sterne, particularly, form the best course of

morality that ever was written. Besides these, read the books mentioned

in the enclosed paper; and, above all things, lose no occasion of

exercising your dispositions to be grateful, to be generous, to be

charitable, to be humane, to be true, just, firm, orderly, courageous,

&c. Consider every act of this kind, as an exercise which will

strengthen your moral faculties and increase your worth.

4. Religion. Your reason is now mature enough to examine this object.

In the first place, divest yourself of all bias in favor of novelty and

singularity of opinion. Indulge them in any other subject rather than

that of religion. It is too important, and the consequences of error

may be too serious. On the other hand, shake off all the fears and

servile prejudices, under which weak minds are servilely crouched. Fix

reason firmly in her seat, and call to her tribunal every fact, every

opinion. Question with boldness even the existence of a God; because,

if there be one, he must more approve of the homage of reason, than

that of blindfolded fear. You will naturally examine first, the

religion of your own country. Read the Bible, then, as you would read

Livy or Tacitus. The facts which are within the ordinary course of

nature, you will believe on the authority of the writer, as you do

those of the same kind in Livy and Tacitus. The testimony of the writer

weighs in their favor, in one scale, and their not being against the

laws of nature, does not weigh against them. But those facts in the

Bible which contradict the laws of nature, must be examined with more

care, and under a variety of faces. Here you must recur to the

pretensions of the writer to inspiration from God. Examine upon what

evidence his pretensions are founded, and whether that evidence is so

strong, as that its falsehood would be more improbable than a change in

the laws of nature, in the case he relates. For example, in the book of

Joshua, we are told, the sun stood still several hours. Were we to read

that fact in Livy or Tacitus, we should class it with their showers of

blood, speaking of statues, beasts, etc. But it is said, that the

writer of that book was inspired. Examine, therefore, candidly, what

evidence there is of his having been inspired. The pretension is

entitled to your inquiry, because millions believe it. On the other

hand, you are astronomer enough to know how contrary it is to the law

of nature that a body revolving on its axis, as the earth does, should

have stopped, should not, by that sudden stoppage, have prostrated

animals, trees, buildings, and should after a certain time have resumed

its revolution, and that without a second general prostration. Is this

arrest of the earth's motion, or the evidence which affirms it, most

within the law of probabilities? You will next read the New Testament.

It is the history of a personage called Jesus. Keep in your eye the

opposite pretensions: 1, of those who say he was begotten by God, born

of a virgin, suspended and reversed the laws of nature at will, and

ascended bodily into heaven; and 2, of those who say he was a man of

illegitimate birth, of a benevolent heart, enthusiastic mind, who set

out without pretensions to divinity, ended in believing them, and was

punished capitally for sedition, by being gibbeted, according to the

Roman law, which punished the first commission of that offence by

whipping, and the second by exile, or death _in furea_. See this law in

the Digest, Lib. 48. tit. 19. § 28.3. and Lipsius Lib. 2. de cruce.

cap. 2. These questions are examined in the books I have mentioned,

under the head of Religion, and several others. They will assist you in

your inquiries; but keep your reason firmly on the watch in reading

them all. Do not be frightened from this inquiry by any fear of its

consequences. If it ends in a belief that there is no God, you will

find incitements to virtue in the comfort and pleasantness you feel in

its exercise, and the love of others which it will procure you. If you

find reason to believe there is a God, a consciousness that you are

acting under his eye, and that he approves you, will be a vast

additional incitement; if that there be a future state, the hope of a

happy existence in that increases the appetite to deserve it; if that

Jesus was also a God, you will be comforted by a belief of his aid and

love. In fine, I repeat, you must lay aside all prejudice on both

sides, and neither believe nor reject anything, because any other

persons, or description of persons, have rejected or believed it. Your

own reason is the only oracle given you by heaven, and you are

answerable, not for the rightness, but uprightness of the decision. I

forgot to observe, when speaking of the New Testament, that you should

read all the histories of Christ, as well of those whom a council of

ecclesiastics have decided for us, to be Pseudo-evangelists, as those

they named Evangelists. Because these Pseudo-evangelists pretended to

inspiration, as much as the others, and you are to judge their

pretensions by your own reason, and not by the reason of those

ecclesiastics. Most of these are lost. There are some, however, still

extant, collected by Fabricius, which I will endeavor to get and send

you.

5. Travelling. This makes men wiser, but less happy. When men of sober

age travel, they gather knowledge, which they may apply usefully for

their country; but they are subject ever after to recollections mixed

with regret; their affections are weakened by being extended over more

objects; and they learn new habits which cannot be gratified when they

return home. Young men, who travel, are exposed to all these

inconveniences in a higher degree, to others still more serious, and do

not acquire that wisdom for which a previous foundation is requisite,

by repeated and just observations at home. The glare of pomp and

pleasure is analogous to the motion of the blood; it absorbs all their

affection and attention, they are torn from it as from the only good in

this, world, and return to their home as to a place of exile and

condemnation. Their eyes are forever turned back to the object they

have lost, and its recollection poisons the residue of their lives.

Their first and most delicate passions are hackneyed on unworthy

objects here, and they carry home the dregs, insufficient to make

themselves or anybody else happy. Add to this, that a habit of

idleness, an inability to apply themselves to business is acquired, and

renders them useless to themselves and their country. These

observations are founded in experience. There is no place where your

pursuit of knowledge will be so little obstructed by foreign objects,

as in your own country, nor any, wherein the virtues of the heart will

be less exposed to be weakened. Be good, be learned, and be

industrious, and you will not want the aid of travelling, to render you

precious to your country, dear to your friends, happy within yourself.

I repeat my advice, to take a great deal of exercise, and on foot.

Health is the first requisite after morality. Write to me often, and be

assured of the interest I take in your success, as well as the warmth

of those sentiments of attachment with which I am, dear Peter, your

affectionate friend.

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