ILLUSIONS, OPTICAL

On the chalk downs of Wiltshire, in sight of the town of

Westbury, there appears a great white horse, which presumably

marks the sight of one of the battles between Alfred the Great

and the Danes. As you look at that white horse upon the hill

from the road approaching it it is perfectly drawn--it is so

accurate that I doubt if any painter of a horse could improve

upon it; but some time ago when I was in that neighborhood, I

went up to the white horse to see it on the spot. There I found

that this cutting in the green turf which revealed the chalk

below was so extensive that if I walked round the outline, I

could cover about a mile, and the shape as it lay along the

slope of the hill had no resemblance to a horse whatever. Like

the long shadows cast by the setting sun, its sprawling limbs

went down the hill, and were so much greater than the width of

the body that you could not have told in walking over it that

the artist--for an artist he was--who designed it could possibly

intend to be drawing a horse; that perfect horse upon the

hillside, to the traveler approaching from Westbury, appeared

to have no existence at all--it was a great perspective drawing

upon the hill, which, when seen close at hand, did not even

suggest a horse’s form. Taking that as an illustration, does it

not often strike you how the whole pageant of earth and sky,

which delights our eye, is just as unreal as the scenery of the

stage? Those clouds that drape the setting sun, and form lofty

mountains and shimmering seas, making a landscape in the sky so

beautiful that no painter on earth could reproduce it; those

clouds that charm us with their beauty, if we were in the midst

of them, would be merely like the drenching rain of an April

day, without beauty, without charm. And those starry heavens

which are to us all of the earth a subject of endless delight

because of their beauty and their incomparable grandeur, are

not in the least what they appear.--ROBERT F. HORTON,

_Christian World Pulpit_.

(1511)

* * * * *

The other day I came across the letter which Galileo wrote to

Kepler, when he was afraid to publish the discoveries which had

been made by the first telescope, and he uses this extraordinary

language: “Fearing the fate of our master Copernicus, who, altho

he has earned immortal fame among a few, yet, by an infinite

number, so only can the number of fools be measured, is hissed

and derided.” It was a peril in the seventeenth century even

to say what those starry heavens are. They have no relation

at all to the objects that we see. That little group of the

Pleiades, which look like fireflies hung in a net in the sky,

in which a very keen eye can perceive seven distinct stars, is

really a group of between 400 and 500 suns, many of them larger

than our own. And that genial sun himself, whose light we love,

which gives to our planet its life, its warmth and its joy--if

we could approach it would terrify us the more we approached

it--a mighty mass of incandescent matter so awful that the

imagination dare hardly entertain the reality of what it is. It

may be said, however, that while these distant objects of the

universe possibly mislead us, our eyes at any rate can trust the

things which are close at hand. But that is quite a delusion,

too. The matter which is close at hand, and which our fathers

thirty years ago treated as the one certainty in the world, is

a complete illusion. I took up in my hand some time ago a few

grains of dried mud from a river-bed. To all appearance they

were like grains of gunpowder, but they were put under the

microscope, and there to my amazement every one of these tiny

grains was a shell, as beautiful and as perfect in form as a

nautilus sailing upon the sea. Not only does the matter we see

delude us, but the delusion is greater from the fact of what we

do not see. Now, the physicist seriously tells us he is using

the strict language of science, and not the language of a fairy

tale, when he says that all the matter we touch, including our

own bodies, is made up of molecules, and the molecule is made

up of atoms, an atom far too minute for the eye to see; and yet

that atom, of which all matter is built up, is itself composed

of electrons, so minute that they dart with inconceivable

velocity from end to end of that tiny atom like a mouse in a

great cathedral--such is the proportion of the electron to

the atom.--ROBERT F. HORTON, _The Christian World

Pulpit_.

(1512)

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