Origen

“ Of life, on the other hand, we read, not that it was as the Word, but that it was made; if at least it be the case that the life is the light of men. For when man was not yet, there was no light of men; for the light of men is conceived only in relation to men. ”

“ But if life is the same thing as the light of men, then no one who is in darkness is living, and none of the living is in darkness; but every one who is alive is also in light, and every one who is in light is living, so that not he only who is living, but every one who is living, is a son of light; and he who is a son of light is he whose work shines before men. ”