I am come a light into the world, that whosoever believes on me should not abide in darkness.
All Commentaries on John 12:46 Go To John 12
Cyril of Alexandria
AD 444
Behold, again He grasps their faith and fixes it on Himself, and effects at once two most useful ends. For on the one hand in professing Himself to be Light He proves that He is God by Nature, for so to be called befits Him alone Who is in His Nature God; and on the other hand by adding the cause of His coming, He brings a blush to the cheek of any man who thinks but little of loving Him. Because we evidently must understand that those who had not yet believed on Him are as yet in darkness, inasmuch as to be in the light that flows from Him is theirs only who have believed on Him. And He leads them also to the remembrance of the things that are spoken in many passages concerning Him, whereby He foretold that He would come to enlighten the world; as for example; Be enlightened, be enlightened, O Jerusalem, for thy Light, the True Light, is come, and the glory of the Lord is risen upon thee; and: Send out Thy Light and Thy Truth. Therefore it is just as if He had said: "I am the Light that in the Scripture is looked for, to come for the salvation of the world, to enlighten them that are wandering in darkness as if in night."