Philo Judaeus De Opificio Mundi 67

So at last all things were created and existing together. But when they all were collected in one place, then some sort of order was necessarily laid down for them for the sake of the production of them from one another which was hereafter to take place. Now in things which exist in part, the principle of order is this, to begin with that which is most inferior in its nature, and to end with that which is the most excellent of all; and what that is we will explain. It has been arranged that seed should be the principle of the generation of animals. It is plainly seen that this is a thing of no importance, being like foam; but when it has descended into the womb and remained there, then immediately it receives motion and is changed into nature; and nature is more excellent than seed, as also motion is better than quiet in created things; and nature, like a workman, or, to speak more correctly, like a faultless art, endows the moist substance with life, and fashions it, distributing it among the limbs and parts of the body, allotting that portion which can produce breath, and nourishment, and sensation to the powers of the soul: for as to the reasoning powers, we may pass over them for the present, on account of those who say, that the mind enters into the body from without, being something divine and eternal.