“Thus,

No one might boast

In the presence of God.”

ὅπως μὴ καυχήσηται πᾶσα σὰρξ ἐνώπιον τοῦ Θεοῦ.

Paul said that thus (ὅπως) no one or all human flesh (πᾶσα σὰρξ) might not boast (μὴ καυχήσηται) in the presence of or before God (ἐνώπιον τοῦ Θεοῦ).  Only the Pauline letters used this word καυχήσηται, that means to boast or glory proudly.  Paul wanted to be clear.  No one, not any human, should boast before God.  Not boasting was also a Jewish virtue.  Paul indicated that this boasting was putting oneself ahead of God.  They could only boast in God, the Lord, Jesus, not in themselves.  Do you boast or put yourself ahead of God?