I know that you are Abraham's descendant; but you seek to kill me, because my word has no place in you.
All Commentaries on John 8:37 Go To John 8
Augustine of Hippo
AD 430
The Jews had asserted they were free, because they were Abraham’s seed. Our Lord replies, I know that you are Abraham’s seed; as if to say, I know that you are the sons of Abraham, but according to the flesh, not spiritually and by faith. So He adds, But you seek to kill Me.
Thatis, has not place in your hearts, because your heart does not take it in. The word of God to the believing, is like the hook to the fish; it takes when it is taken: and that not to the injury of those who are caught by it. They are caught for their salvation, not for their destruction.
Our Lord by His Father wishes us to understand God: as if to say, I have seen the truth, I speak the truth, because I am the truth. If our Lord then speaks the truth which He saw with the Father, it is Himself that He saw, Himself that He speaks; He being Himself the truth of the Father.
As if to say, What are you going to say against Abraham? They seem to be inviting Him to say something in disparagement of Abraham; and so to give them an opportunity of executing their purpose.
And yet He says above, I know that you are Abraham’s seed. So He does not deny their origin, but condemns their deeds. Their flesh was from him; their life was not.
He does not say as yet who is their father.