10. I may perhaps declare that matter more plainly still. One lights a candle: that candle, for example, so far as regards the little flame which shines there—that fire has light in itself; but thine eyes, which lay idle and saw nothing, in the absence of the candle, now have light also, but not in themselves. Further, if they turn away from the candle, they are made dark; if they turn to it, they are illumined. But certainly that fire shines so long as it exists: if thou wouldst take the light from it, thou dost also at the same time extinguish it; for without the light it cannot remain. But Christ is light inextinguishable and co-eternal with the Father, always bright, always shining, always burning: for if He were not burning, would it be said in the psalm, “Nor is there any that can hide himself from his heat?” But thou wast cold in thy sin; thou turnest that thou mayest become warm; if thou wilt turn away, thou wilt become cold. In thy sin thou wast dark; thou turnest in order to be enlightened; if thou turnest away, thou wilt become dark. Therefore, because in thyself thou wast darkness, when thou shalt be enlightened, thou wilt be light, though in the light. For saith the apostle, “Ye were once darkness, but now light in the Lord.” When he had said, “but now light,” he added, “in the Lord.” Therefore in thyself darkness, “light in the Lord.” In what way “light”? Because by participation of that light thou art light. But if thou wilt depart from the light by which thou art enlightened, thou returnest to thy darkness. Not so Christ, not so the Word of God. But how not? “As the Father hath life in Himself, so hath He given also to the Son to have life in Himself;” so that He lives, not by participation, but unchangeably, and is altogether Himself life. “So hath He given also to the Son to have life.” Even as He hath, so has He given. What is the difference? For the one gave, the other received. Was He already in being when He received? Are we to understand that Christ was at any time in being without light, when Himself is the wisdom of the Father, of which it is said, “It is the brightness of the eternal light?” Therefore what is said, “gave to the Son,” is such as if it were said, “begat the Son;” for by begetting He gave. As He gave Him to be, so He gave Him to be life, so also gave Him to be life in Himself. What is that, to be life in Himself? Not to need life from elsewhere, but to be Himself the plenitude of life, out of which others believing should have life while they lived. “Hath given Him,” then, “to have life in Himself.” Hath given as to whom? As to His own Word, as to Him who “in the beginning was the Word, and the Word was with God.”