Westminster Larger Catechism · 1647

Q73. How doth faith justify a sinner in the sight of God?

Faith justifies a sinner in the sight of God, not because of those other graces which do always accompany it, or of good works that are the fruits of it, nor as if the grace of faith, or any act thereof, were imputed to him for his justification; but only as it is an instrument by which he receiveth and applies Christ and his righteousness.
Answer · Westminster Larger Catechism

Scripture proofs

  1. [1]
    Galatians 3:11

    But that no man is justified by the law in the sight of God, it is evident: for, The just shall live by faith.

    Romans 3:28

    Therefore we conclude that a man is justified by faith without the deeds of the law.

  2. [2]
    Romans 4:5

    But to him that worketh not, but believeth on him that justifieth the ungodly, his faith is counted for righteousness.

    Romans 10:10

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

  3. [3]
    John 1:12

    But as many as received him, to them gave he power to become the sons of God, even to them that believe on his name:

    Philippians 3:9

    And be found in him, not having mine own righteousness, which is of the law, but that which is through the faith of Christ, the righteousness which is of God by faith:

    Galatians 2:16

    Knowing that a man is not justified by the works of the law, but by the faith of Jesus Christ, even we have believed in Jesus Christ, that we might be justified by the faith of Christ, and not by the works of the law: for by the works of the law shall no flesh be justified.

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