Discovery BoxJohn 12:36-40 
Context12:36 While you have the light, believe in the light, so that you may become sons of light.” 1 When Jesus had said these things, he went away and hid himself from them.
12:37 Although Jesus 2 had performed 3 so many miraculous signs before them, they still refused to believe in him, 12:38 so that the word 4 of Isaiah the prophet would be fulfilled. He said, 5 “Lord, who has believed our message, and to whom has the arm of the Lord 6 been revealed?” 7 12:39 For this reason they could not believe, 8 because again Isaiah said,
12:40 “He has blinded their eyes
and hardened their heart, 9
so that they would not see with their eyes
and understand with their heart, 10
1 tn The idiom “sons of light” means essentially “people characterized by light,” that is, “people of God.”
sn The expression sons of light refers to men and women to whom the truth of God has been revealed and who are therefore living according to that truth, thus, “people of God.”
2 tn Grk “he”; the referent (Jesus) has been specified in the translation for clarity.
3 tn Or “done.”
4 tn Or “message.”
5 tn Grk “who said.”
6 tn “The arm of the Lord” is an idiom for “God’s great power” (as exemplified through Jesus’ miraculous signs). This response of unbelief is interpreted by the author as a fulfillment of the prophetic words of Isaiah (Isa 53:1). The phrase ὁ βραχίων κυρίου (Jo braciwn kuriou) is a figurative reference to God’s activity and power which has been revealed in the sign-miracles which Jesus has performed (compare the previous verse).
7 sn A quotation from Isa 53:1.
8 sn The author explicitly states here that Jesus’ Jewish opponents could not believe, and quotes Isa 6:10 to show that God had in fact blinded their eyes and hardened their heart. This OT passage was used elsewhere in the NT to explain Jewish unbelief: Paul’s final words in Acts (28:26-27) are a quotation of this same passage, which he uses to explain why the Jewish people have not accepted the gospel he has preached. A similar passage (Isa 29:10) is quoted in a similar context in Rom 11:8.
9 tn Or “closed their mind.”
10 tn Or “their mind.”
11 tn One could also translate στραφῶσιν (strafwsin) as “repent” or “change their ways,” but both of these terms would be subject to misinterpretation by the modern English reader. The idea is one of turning back to God, however. The words “to me” are not in the Greek text, but are implied.
