(38.) I am not aware whether a dog has the faculties of selection, memory, love, fear, imagination, and thought. When, therefore, I am told that those actions in a dog are not the effect of either passion or sentiment, but proceed naturally and necessarily from a mechanical disposition caused by the multiple organization of the material parts of his body, I may, perhaps, acquiesce in this doctrine. But as for me, I think, and certainly know that I think.[870] Now, if we consider any organisation of material parts, namely, any space with all its dimensions, length, breadth, and depth, and which can be divided in all these directions, what proportion is there between such a space and cogitation?

(39.) If all things are matter, and if thought within me, as well as in other men, be no more than an effect of the arrangement of matter, how came any other idea, but that of material things into this world? Is matter able to produce so pure, so simple, so immaterial an idea as we have of spirit? How can matter be the origin of that which rejects and excludes such an idea from its very being? How can it be the cogitative principle in man, that is, that principle which convinces man he is not merely matter?

(40.) There are beings of short duration, because they are made up of things varying much in their nature, and destructive to one another; there are others more lasting, because they are simpler, but they perish at last, being made up of several parts, into which they are divisible. That which thinks within me must naturally be permanent, as it is a pure being, free from all mixture and composition; there is no reason why it should perish; for what can corrupt or divide a simple being, in which are no parts?

(41.) The soul sees colour through the organ of the eye, and hears sounds through the organ of the ear; but it may cease either from seeing or hearing when those senses or those objects are absent, and yet not cease from existing, because it is not exactly the soul that sees or hears; it is only that which thinks. Now, how can it cease from being such? Not for want of organs, since it has been proved it is not matter; nor for want of objects, whilst there is a God and eternal truths; it is therefore incorruptible.

(42.) I cannot conceive the annihilation of a soul which God has filled with the idea of His infinite and all-perfect being.

(43.) Observe, Lucilius,[871] this spot of ground, which for neatness and ornament exceeds all other neighbouring estates; here are plots with the finest lakes and fountains, and endless hedge-rows of trees which shelter you against the north winds; on this side is a thick grove where the sun cannot penetrate; on the other side you have a beautiful view; a little lower, the Yvette or the Lignon,[872] which were running modestly between willows and poplars, have now become a canal quite bricked in; elsewhere long and cool avenues lead to the country, and foreshadow what the mansion will be, which is surrounded by water. Will you say, “This is an effect of chance,” and suppose that all these admirable things met together accidentally? No, certainly; on the contrary, you observe that everything is well planned and arranged, and displays good taste and much intelligence. I agree with you, and take the liberty to add that I suppose it to be the residence of one of those men, who from the very minute they get into office, send for a Le Nôtre[873] to draw plans and take measurements. Yet what is this piece of ground so exquisitely laid out, on which a most skilful artist has employed all his science in order to embellish it, if the whole earth is but an atom suspended in the air, and if you will but listen to what I am going to say?

You are placed, Lucilius, on some part of this atom; you must needs be very little, since you take up so little room on it; yet you have eyes, like two imperceptible points; open them, however, and look up to the heavens; what do you sometimes perceive there? Is it the moon in its full? It is beautiful and very radiant at the time, though all its light be but the reflection of the light of the sun; it appears as large as the sun itself, larger than the other planets, than any of the stars, but do not be deceived by outward appearances. Nothing in the heavens is so small as the moon; its superficies exceeds not the thirteenth part, and its volume not the eight and fortieth part of the earth, whilst its diameter, which is two thousand two hundred and fifty miles, is but a fourth of the diameter of the earth. What makes it really appear so great is its proximity only; for its distance from us is no more than thirty times the diameter of the earth, or three hundred thousand miles.[874] Its motion is small in comparison to the prodigious long career of the sun through the spacious firmament;[875] for it is certain the moon does not move at the rate of above sixteen hundred and twenty thousand miles a day,[876] which is not above sixty-seven thousand five hundred miles per hour, or one thousand one hundred and twenty-five in a minute. And yet, to complete this course it must move five thousand six hundred times faster than a race-horse running twelve miles an hour; it must be eighty times swifter than sound—than the report, for example, of a gun or of thunder, which moves at the rate of eight hundred and thirty-one miles an hour.[877]

But if you will oppose the moon to the sun with respect to its size, its distance, and its course, you will find there is no comparison to be made between them.