I know you are Abraham’s descendants, but you are trying to kill Me because My word has no place within you.
37. I know that you are Abraham’s seed. I explain this as said by way of concession. Yet at the same time he ridicules their folly in glorying in so absurd a title, as if he had said: “Granting that on which you flatter yourselves so much, still what avails it that those men are called the children of Abraham, who are enraged against God...
We have in these verses, I. A comfortable doctrine laid down concerning the spiritual liberty of Christ's disciples, intended for the encouragement of those Jews that believed. Christ, knowing that his doctrine began to work upon some of his hearers, and perceiving that virtue had gone out of him, turned his discourse from the proud Pharisees, and addressed himself to those weak believers.
Commenting on John 8:31-37
But now ye seek to kill me,.... A temper and disposition very foreign from that of Abraham's: a man that hath told you the truth, which I have heard of God; to seek to kill a man is a very great crime, and punishable with death; to kill an innocent one, that had done no sin, who was pure, holy, harmless, and inoffensive to God...