35 Then Jesus told them, "You are going to have the light just a little while longer. Walk while you have the light, before darkness overtakes you. Whoever walks in the dark does not know where they are going. 36 Believe in the light while you have the light, so that you may become children of light." When he had finished speaking, Jesus left and hid himself from them.

Matthew Henry's Commentary on John 12:35-36

Commentary on John 12:34-36

(Read John 12:34-36)

The people drew false notions from the Scriptures, because they overlooked the prophecies that spoke of Christ's sufferings and death. Our Lord warned them that the light would not long continue with them, and exhorted them to walk in it, before the darkness overtook them. Those who would walk in the light must believe in it, and follow Christ's directions. But those who have not faith, cannot behold what is set forth in Jesus, lifted up on the cross, and must be strangers to its influence as made known by the Holy Spirit; they find a thousand objections to excuse their unbelief.