Then Jesus said unto them,
Yet a little while is the light with you. Walk while you have the light, lest darkness come upon you: for he that walks in darkness knows not where he goes.
All Commentaries on John 12:35 Go To John 12
Cyril of Alexandria
AD 444
To the Jews, without understanding and faithless as they were, the Christ does not clearly and at length declare the deep mystery of the saying. But He speeds on at once to utter another, at the same time both expounding what is profitable for them and shewing them the cause wherefore they do not understand the things in the Scriptures, and that, if they believed not Him Who is Light, the darkness of ignorance would overtake them without fail, and they would forfeit the benefits that come of the Light. For inasmuch as their expectations were drawn from the Scripture, they looked for the Messiah as a Light. But when He came, all their hopes fell out contrariwise; for a darkness overtook them because of their unbelief. Recover yourselves therefore (saith He) speedily, while it is possible for you to win some small share in the radiance of the Divine Light, in order that the darkness of sin overtake you not. And right well He said that after the Light cometh the darkness. For the darkness presseth hard on the track of the departing light. But whereas He spake of "the Light," using the definite article, He signified Himself, for He alone is in truth The Light.