Great Quote on Justification

Question: How art thou righteous before God?
Answer: Only by true faith in Jesus Christ; that is, although my conscience accuse me that I have grievously sinned against all the commandments of God, and have never kept any of them, and that I am still prone always to all evil, yet God, without merit of mine, of mere grace, grants and imputes to me the perfect satisfaction, righteousness, and holiness of Christ, as if I had never committed nor had any sin, and had myself accomplished all the obedience which Christ has fulfilled for me, if only I accept such benefit with a believing heart. -- from the Heidelberg Confession (1563) Question 60.