18 For the wrath of God is revealed from heaven against all ungodliness and unrighteousness of men, who suppress the truth in unrighteousness, 19 because what may be known of God is manifest in them, for God has shown it to them. (Romans 1:18–19, NKJV)
God has shown His power and deity to mankind. This truth, that “may be known of God,” has been revealed by God Himself (v. 19). The very existence of this universe testifies of His creative power and divine nature (Rom. 1:20). The psalmist David recognized this when he wrote, “The heavens declare the glory of God; And the firmament shows His handiwork. Day unto day utters speech, and night unto night reveals knowledge. There is no speech nor language where their voice is not heard” (Psa. 19:1-3). Since God’s creation speaks of His power and deity, all who reject and oppose this truth are “without excuse” and under divine wrath (Rom. 1:20). God’s wrath is directed against “all ungodliness and unrighteousness” – these sins “suppress” (hold down) the truth that God has made known about Himself. Sins against God and against men display faithlessness that is seen and punished by our Creator. Therefore, God’s wrath against sin is an incentive to know Him and obey His truth, not oppose Him.