Matthew Poole and continuators on Job 9:20

20. If I justifie my self , mine own mouth shall condemn me : if I say, I am perfect , it shall also prove me perverse.

If I plead against God mine own Righteousness and Innocency.

God is so infinitely wise and just, that he will find sufficient matter of condemnation from my own words, though spoken with all possible care and circumspection; or he will discover so much wickedness in me of which I was not aware, that I shall be forced to joyn with him in condemning my self.

If I were perfect in my own opinion; If I thought my self compleatly righteous and faultless.

i. e. My own mouth, as he now said. Or, he, i. e. God, who is easily understood by comparing this with the former Verses, where the same he is oft mentioned.