While you have light, believe in the light, that you may be the children of light.
These things spoke Jesus, and departed, and did hide himself from them.
All Commentaries on John 12:36 Go To John 12
Cyril of Alexandria
AD 444
While ye have the Light, believe on the Light, that ye may become sons of Light.
He proved therefore that the faith which is in Him, through Whom a man comes to the knowledge also of the Father, is the way of salvation. And He names them sons of Light whether of Himself or of the Father, for He speaks of the Father as Light after having spoken of Himself as Light----in order to show that the Nature of Himself and of His Father is One: and we become sons of the Father, when, through the faith which is in Christ, we accept the Father Who is Light; for then shall we also be entitled children of God.