Heidelberg Catechism

Part II: Deliverance

God the Holy Spirit

Q & A 65
Q. It is through faith alone that we share in Christ and all his benefits: where then does that faith come from?
A. The Holy Spirit produces it in our hearts1 by the preaching of the holy gospel,2 and confirms it by the use of the holy sacraments.3

1 John 3:5; 1 Cor. 2:10-14; Eph. 2:8
2 Rom. 10:17; 1 Pet. 1:23-25
3 Matt. 28:19-20; 1 Cor. 10:16