Catechism Question #32 (January)
Q. What is justification?
A. Justification is an act of God's free grace, wherein he pardons all our sins, and accepts us as righteous in his sight, only for the righteousness of Christ imputed to us, and received by faith alone.
2 Corinthians 5:21 For He made Him who knew no sin to be sin for us, that we might become the righteousness of God in Him.