Plutarch Quaestiones Convivales 2.3.2

[2] Soon after he proposed that perplexed question, that plague of the inquisitive, Which was first, the bird or the egg? And my friend Sylla, saying that with this little question, as with an engine, we shook the great and weighty question (whether the world had a beginning), declared his dislike of such problems. But Alexander deriding the question as slight and impertinent, my relation Firmus said: 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 every thing with its proper form; and it was for this reason that the statuary Polycletus said, Then our work is most difficult, when the clay comes to be fashioned by the nail. 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. As the canker is first, and then growing dry and cleaving lets forth a winged animal, called psyche; so the egg is first as it were the subject matter of the generation. For it is certain that, in every change, that out of which the thing changes must be before the thing changing. Observe how worms and caterpillars are bred in trees from the moisture corrupted or concocted; now none can say but that the engendering moisture is naturally before all these. For (as Plato says) matter is as a mother or nurse in respect of the bodies that are formed, and we call that matter out of which any thing that is is made. And with a smile continued he, I speak to those that are acquainted with the mystical and sacred discourse of Orpheus, who not only affirms the egg to be before the bird, but makes it the first being in the whole world. The other parts, because deep mysteries (as Herodotus would say), we shall now pass by; but let us look upon the various kinds of animals, and we shall find almost every one beginning from an egg,—fowls and fishes; land animals, as lizards; amphibious, as crocodiles; some with two legs, as a cock; some without any, as a snake; and some with many, as a locust. And therefore in the solemnly feast of Bacchus it is very well done to dedicate an egg, as the emblem of that which begets and contains every thing in itself.