Watch out for conscience especially a guilty conscience. As believers in Jesus, if we understand grace and that we are righteous as a forever gift by the grace of his perfect sacrifice, our conscience at first may rebel. But if we understand that God the Father righteously calls us the righteousness of God in Christ because God fully judged and condemned all of our sins on the body of Jesus Christ and we got the exchange - his righteousness for our sin - our consciences will begin to accept no guilt or condemnation and begin to heal.
We want to be lead by His peace, not by conscience. But a conscience in tune with God’s spirit is truly a fired up conscience.