He has something
To boast about,
But not before God.”
εἰ γὰρ Ἀβραὰμ ἐξ ἔργων ἐδικαιώθη, ἔχει καύχημα· ἀλλ’ οὐ πρὸς Θεόν,
Paul said that if Abraham (εἰ γὰρ Ἀβραὰμ) was justified (ἐδικαιώθη) by works (ἐξ ἔργων), he would have something to boast about (ἔχει καύχημα·), but not before God (ἀλλ’ οὐ πρὸς Θεόν). Only the Pauline letters used this word καύχημα, that means to boast or grounds for boasting. Paul indicated that if Abraham wanted to boast about his great works that it might have some legitimacy before humans, but not before God. You cannot boast about being justified by your deeds. It might work with humans, but not God. Do you boast about your good works before others and forget about your faith in God?