There Is No One Righteous; No, Not One
This passage stresses how corrupt human nature is and declares that there is no one righteous. Quoting the Old Testament, the apostle Paul makes clear that all people, Jews and Gentiles alike, are under sin. It warns that those who chase the pleasures of the world even after experiencing God commit the sin of nailing Jesus to the cross again.
Like King Saul, those who take grace lightly and become proud lose their spiritual perception and come to death. David, by contrast, relied on God even in suffering and was protected, but after becoming king he drew away from God and could not escape the bondage of sin. This shows that human beings are sinners by nature and, being under Satan's rule, cannot free themselves from sin.
Sin lights the wick and in the end leads to ruin, and it makes the human heart as corrupt as an open tomb. The way of those who do not know the way of peace is always nothing but ruin and accusation, and without the fear of God one cannot find the way of truth. The sermon asks believers to repent, putting on the whole armor of God and resolving to die daily, in order to stand against Satan's schemes.