I tell the truth in Christ, I am not lying, my conscience also bearing me witness in the Holy Spirit, 2 that I have great sorrow and continual grief in my heart. 3 For I could wish that I myself were accursed from Christ for my brethren, my countrymen according to the flesh . . . Romans 9:1-3 NKJV
Apostle Paul, a Jew, preached salvation to both the Gentiles and the Jews. Many of his Jewish countrymen considered him a traitor; but he was not. Paul was deeply devoted to the Jewish people (Rom. 10:1-3); and notwithstanding, he preached the truth of the Gospel of grace, and did not lie. His conscience—the inward voice—confirmed his truth in the Holy Spirit.
Man is a spirit; he possesses a soul and lives in a body. The inward spirit man has a voice—a voice of conscience—that confirms what is truth and keeps us in tune with the Holy Spirit. This voice exists in every man, and it is a strong witness of our integrity or our guilt. “Conscience” is a conscious judgment whereby we decide whether our thoughts, actions and motives are morally right or wrong, which we instantly approve or condemn.
The inward voice of conscience always tell us the truth—the good, bad, and ugly. So, we should obey our conscience, and therefore, let our conscience be our guide (1 John 3:20-21). God himself speaks through the voice of our conscience as He did with Paul. “The spirit of man is the candle of the Lord, searching the innermost depths of the heart” (Prov. 20:27). And, God lives in us by His Spirit, and God speaks where He lives (John 14:23; 1 Cor. 3:16; 2 Cor. 6:16). Again, He speaks through the inward voice, i.e., the voice of our conscience. Thus, we need to keep our conscience clear to hear.
Also, it is critical to keep a sensitive and tender conscience, not burned and seared (1 Tim. 4:1-2).When your conscience becomes seared, the inward voice becomes distorted, muffled, muted, and out of tune with the Holy Spirit. Every time you ignore the inward voice of your conscience, you burn your conscience. Ouch!