Romans 3:17

"What then have we more than they? For we have proved both Jews and Gentiles, that they are all under sin. As it is written, There is none righteous, no, not one." He had accused the Gentiles, he had accused the Jews; it came next in order to mention the righteousness which is by faith. For if the law of nature availed not, and the written Law was of no advantage, but both weighed down those that used them not aright, and made it plain that they were worthy of greater punishment, then after this the salvation which is by grace was necessary. Speak then of it, O Paul, and display it. But as yet he does not venture, as having an eye to the violence of the Jews, and so turns afresh to his accusation of them; and first he brings in as accuser, David speaking of the same things at length, which Isaiah mentioned all in short compass, so furnishing a strong curb for them, so that they might not bound off, nor any of his hearers, while the matters of faith were laid open to them, might after this start away; being beforehand safely held down by the accusations of the prophets. For there are three excesses which the prophet lays down; he says that all of them together did evil, and that they did not do good indifferently with evil, but that they followed after wickedness alone, and followed it also with all earnestness. And next that they should not say, "What then, if these things were said to others?" he goes on:

Having chosen the way of hostility, along which they were heading toward the second death, they did not want to know about the way which leads to eternal life. This is called the way of peace, because with God as its guardian it will have …

Third, he shows their persistence in evil, from which men are returned in two ways. In one way by a desire to be at peace with others. Against this he says, the way of peace they have not known, i.e., have not accepted: among those …

"They do not know the way of peace," that is, of a godly life; for a godly life is a path of tranquility. "Take," says the Lord, "My yoke... and you will find rest" (Matt. 11:29): this is the way to the true peace of …

And the way of peace have they not known. This is a citation front Isa 59:8, and expresses the ignorance of mankind, with regard to true peace, and the way unto it: men are naturally ignorant of the way of peace with God; of the first step which God took towards it; of the council and covenant of peace, in which the scheme of it was drawn, and the method fixed; of Christ the peacemaker, and of the way in which he has made it; and of the Gospel, which reveals and publishes it.