37 All these God-signs he had given them and they still didn't get it, still wouldn't trust him. 38 This proved that the prophet Isaiah was right: God, who believed what we preached? Who recognized God's arm, outstretched and ready to act? 39 First they wouldn't believe, then they couldn't - again, just as Isaiah said: 40 Their eyes are blinded, their hearts are hardened, So that they wouldn't see with their eyes and perceive with their hearts, And turn to me, God, so I could heal them. 41 Isaiah said these things after he got a glimpse of God's cascading brightness that would pour through the Messiah.
42 On the other hand, a considerable number from the ranks of the leaders did believe. But because of the Pharisees, they didn't come out in the open with it. They were afraid of getting kicked out of the meeting place. 43 When push came to shove they cared more for human approval than for God's glory.
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.