The Apostle often explained these thoughts about the law for those who boasted in the law. He did this to show its true worth and meaning, and thus to restrain the pride of the foolish Hebrews.
The Apostle used the expression “all flesh” shall not be justified to indicate where the source of weakness lies. It is not in the law, but in us.
“As men bearing flesh, we cannot fulfill the law. Therefore there is no need even to think that anyone could be justified by the old law,” says Bishop Theophan.
In listing the kinds and forms of sinful men’s corruption, the Apostle points to a general turning away from striving to know God and serve Him.
He also points to the desire to walk in one’s own ways, to please oneself alone and not serve others, mutual deceit, secret ill will, slander, crafty and evil treachery, and readiness for the most dreadful murders.
All this happens with complete forgetfulness of fear before God, the Giver of recompense.
It is clear that sinners of this kind cannot obtain justification from God by themselves. Little by little, they also bring corruption into the whole earthly world.
Everywhere they produce discord, disorder, and malice, so that men have become beasts and deadly serpents toward one another. Many Roman writers of that time clearly testified to this.
But the Apostle Paul depicts human sinfulness on the basis of more ancient and more trustworthy God-inspired writings. By this he removes every foundation for the arrogance and haughtiness of the Hebrews.
They boasted vainly in the works of the law. Paul urges all to run to God with complete repentance and to receive grace through faith.