John 12:34-36

34 Then the people in answer said to him, The law says that the Christ will have life without end: how say you then that it is necessary for the Son of man to be lifted up? Who is this Son of man?

35 Jesus said to them, For a little time longer the light will be among you; while you have the light go on walking in it, so that the dark may not overtake you: one walking in the dark has no knowledge of where he is going.

36 In so far as you have the light, put your faith in the light so that you may become sons of light. With these words Jesus went away and for a time was not seen again by them.