12 “They have all turned aside; They have together become unprofitable; There is none who does good, no, not one.” 13 “Their throat is an open tomb; With their tongues they have practiced deceit”; “The poison of asps is under their lips”; 14 “Whose mouth is full of cursing and bitterness.” (Romans 3:12–14, NKJV)
In this passage the apostle used a number of quotations from the Psalms and the Prophets to fortify his statement that “all are under sin” (Rom. 3:9). In verse 12 he applies Psalm 14:3, pointing out the futility of seeking satisfaction in things that turn us away from God and His way of truth. Sin’s futility is exposed – it never delivers what it promises (2 Pet. 2:19). Next, Paul quoted Psalm 5:9, 40:3, and 10:7 in verses 13 and 14 to amplify the sins of the tongue. Our words come from our heart, therefore, when we lie, curse and speak bitter words we reveal malice and contempt in our heart. Stinging words that hurt and harm identify a real and present danger to our souls. We must control our heart to speak words that are fitting, not destructive (Prov. 25:11). We must use God’s word to identify our sins. By doing so we can be convicted, leading to repentance (Acts 2:37-38). Otherwise, we remain enslaved to sin and spiritually dead.