8 Worthy of admiration is the virtue of that man, my brethren! For through Timothy he enjoins upon all, that they should have regard to nothing more than to godliness, but above everything to adjudge the chief place to faith in God. For what grace has the unrighteous man, though he may feign to keep the commandments? Nay rather, the unrighteous man is unable even to keep a portion of the law, for as is his mind, such of necessity must be his actions; as the Spirit says, reproving such; 'The fool has said in his heart, there is no God.'
After this the Word, showing that actions correspond with thoughts, says, 'They are corrupt; they are profane in their machinations. ' The unrighteous man then, in every respect corrupts his body; stealing, committing adultery, cursing, being drunken, and doing such like things. Even as Jeremiah, the prophet, convicts Israel of these things, crying out and saying, 'Oh, that I had a lodge far off in the wilderness! Then would I leave my people and depart from them: for they are all adulterers, an assembly of oppressors, who draw out their tongue as a bow; lying and not truth has prevailed upon the earth, and they proceed from iniquities to iniquities; but Me they have not known.'
Thus, for wickedness and falsehood, and for deeds, in which they [proceed] from iniquity to iniquity, he reproves their practices; but, because they knew not the Lord, and were faithless, he charges them with unrighteousness.
Source: Letters (New Advent)