Heidelberg Catechism · 1563

Q61. Why do you say that you are righteous only by faith?

Not that I am acceptable to God on account of the worthiness of my faith, for only the satisfaction, righteousness, and holiness of Christ is my righteousness before God. I can receive this righteousness and make it mine my own by faith only.
Answer · Heidelberg Catechism

Scripture proofs

  1. [1]
    1 Corinthians 1:30-31

    But of him are ye in Christ Jesus, who of God is made unto us wisdom, and righteousness, and sanctification, and redemption: That, according as it is written, He that glorieth, let him glory in the Lord.

    1 Corinthians 2:2

    For I determined not to know any thing among you, save Jesus Christ, and him crucified.

  2. [2]
    Romans 10:10

    For with the heart man believeth unto righteousness; and with the mouth confession is made unto salvation.

    1 John 5:10-12

    He that believeth on the Son of God hath the witness in himself: he that believeth not God hath made him a liar; because he believeth not the record that God gave of his Son. And this is the record, that God hath given to us eternal life, and this life is in his Son. He that hath the Son hath life; and he that hath not the Son of God hath not life.

Proof texts as given in the original; verse text from the King James Version.