The Apostle often unfolded these thoughts about the law for those who boasted in the law. He did this to show its true worth and meaning, and thereby restrain the pride of the foolish Hebrews.
The Apostle used the expression “all flesh” shall not be justified to show 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 thought that anyone could be justified by the old law,” says Bishop Theophan.
In listing the kinds and forms of sinful men’s depravity, the Apostle points to a general turning away from the desire to know God and serve Him. He points to the wish to walk in one’s own ways, to please only oneself, and not to serve others.
He also points to mutual deceit, hidden ill will, slander, cunning and malicious treachery, and readiness for the most terrible murders. In all this, the fear of God the Rewarder is wholly forgotten.
It is clear that sinners of this kind not only cannot receive justification from God by themselves. Little by little, they also bring corruption into the whole earthly world.
Everywhere they produce discord, disorder, and malice. Men became like beasts and deadly serpents to one another, as many Roman writers of that time clearly testified.
But the Apostle Paul depicts human sinfulness on the basis of more ancient and more reliable God-inspired writings. In this way he removes every foundation for the arrogance and haughtiness of the Hebrews, who vainly boasted in the works of the law.
He also urges all to hasten to God with full repentance and to receive grace through faith.