Well, sir, at present your atoms will do me some service; for if we suppose that small things must be the principles of greater, it is likely that the egg was before the bird; for an egg amongst sensible things is very simple, and the bird is more mixed, and contains a greater variety of parts.

It is universally true that a principle is before that whose principle it is; now the seed is a principle, and the egg is somewhat more than the seed and less than the bird for as a disposition or a progress in goodness is something between a tractable mind and a habit of virtue, so an egg is as it were a progress of Nature tending from the seed to a perfect animal.

And as in an animal they say the veins and arteries are formed first, upon the same account the egg should be before the bird, as the thing containing before the thing contained.

Thus art first makes rude and ill-shapen figures and afterwards perfects everything with its proper form; and it was for this that the statuary Polycletus said, Then our work is most difficult, when the clay comes to be fashioned by the fingers.

So it is probable that matter, not readily obeying the slow motions of contriving Nature, at first frames rude and indefinite masses, as the egg, and of these moulded anew, and joined in better order, the animal afterward is formed.