7 Therefore thus says the Lord of hosts: “Behold, I will refine them and try them; For how shall I deal with the daughter of My people? 8 Their tongue is an arrow shot out; It speaks deceit; One speaks peaceably to his neighbor with his mouth, but in his heart he lies in wait. 9 Shall I not punish them for these things?” says the Lord. “Shall I not avenge Myself on such a nation as this?” (Jeremiah 9:7–9, NKJV)
God’s ancient people needed refining; the dross had to be removed. Jerusalem and Judah was to be cleansed by God’s punishment (Babylonian destruction and exile, Jer. 25:1-14). One of their pervasive sins was speaking deceitful words. They spoke flattering lies with hearts full of malice. From this we learn that God takes note of our words and of our heart that prompts what we say. God saw their flattering, malicious lies as a personal affront to His holy character. He would avenge Himself on the unholy nation. This impresses us to realize that when we speak lies we sin against God Himself. Sins of the tongue do not escape His notice or His judgment. May we purify our hearts so that both our words and our hearts are acceptable to the Lord, the Holy One of Israel (Psa. 19:14).