By true faith in Jesus Christ,
I am right with God
and heir to life everlasting.
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 toward 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 Christ,
as if I have never sinned nor been a sinner,
as if I had been as perfectly obedient
as Christ was obedient for me.
All I need to do
is accept this gift of God with a believing heart.

(from Heidelberg Catechism, questions 59-60, and taken from Christ-Centered Worship by Bryan Chapell)