37 Although he had performed so many signs in their presence, they did not believe in him. 38 This was to fulfill the word spoken by the prophet Isaiah: "Lord, who has believed our message, and to whom has the arm of the Lord been revealed?" 39 And so they could not believe, because Isaiah also said, 40 "He has blinded their eyes and hardened their heart, so that they might not look with their eyes, and understand with their heart and turn- and I would heal them." 41 Isaiah said this because he saw his glory and spoke about him.
42 Nevertheless many, even of the authorities, believed in him. But because of the Pharisees they did not confess it, for fear that they would be put out of the synagogue; 43 for they loved human glory more than the glory that comes from God.
Matthew Henry's Commentary on John 12:37-43
Commentary on John 12:37-43
(Read John 12:37-43)
Observe the method of conversion implied here. Sinners are brought to see the reality of Divine things, and to have some knowledge of them. To be converted, and truly turned from sin to Christ, as their Happiness and Portion. God will heal them, will justify and sanctify them; will pardon their sins, which are as bleeding wounds, and mortify their corruptions, which are as lurking diseases. See the power of the world in smothering convictions, from regard to the applause or censure of men. Love of the praise of men, as a by-end in that which is good, will make a man a hypocrite when religion is in fashion, and credit is to be got by it; and love of the praise of men, as a base principle in that which is evil, will make a man an apostate, when religion is in disgrace, and credit is to be lost for it.