Q. How are you right with God?
A. Only by true faith in Jesus Christ. Even though my conscience accuses me of having grievously sinned against all God’s commandments and of never having kept any of them, and even though I am still inclined towards all evil, nevertheless, without my deserving it at all, out of sheer grace, God grants and credits to me the perfect satisfaction, righteousness and holiness of Jesus Christ, as if I had never sinned or been a sinner, as if I had been as perfectly obedient as Christ was obedient for me. All I need to do is to accept this gift of God with a believing heart.
Question 60 from the Heidelberg Catechism