And that, he says, the originating principle of the generation of things begotten is from fire, he discerns after some such method as the following. Of all things, (i.e.) of whatsoever there is a generation, the beginning of the desire of the generation is from fire. Wherefore the desire after mutable generation is denominated “to be inflamed.” For when the fire is one, it admits of two conversions. For, he says, blood in the man being both warm and yellow, is converted as a figured flame into seed; but in the woman this same blood is converted into milk. And the conversion of the male becomes generation, but the conversion of the female nourishment for the fœtus. This, he says, is “the flaming sword, which turned to guard the way of the tree of life.” For the blood is converted into seed and milk, and this power becomes mother and father—father of those things that are in process of generation, and the augmentation of those things that are being nourished; (and this power is) without further want, (and) self-sufficient. And, he says, the tree of life is guarded, as we have stated, by the brandished flaming sword. And it is the seventh power, that which (is produced) from itself, (and) which contains all (powers, and) which reposes in the six powers. For if the flaming sword be not brandished, that good tree will be destroyed, and perish. If, however, these be converted into seed and milk, the principle that resides in these potentially, and is in possession of a proper position, in which is evolved a principle of souls, (such a principle,) beginning, as it were, from a very small spark, will be altogether magnified, and will increase and become a power indefinite (and) unalterable, (equal and similar) to an unalterable age, which no longer passes into the indefinite age.