The Heidelberg Catechism: Lord's Day 8

24. Question: How are these articles divided?

Answer: Into three parts: the first is about God the Father and our creation; the second about God the Son and our redemption; the third about God the Holy Spirit and our sanctification.

25. Question: Since there is only one God,[1] why do you speak of three persons, Father, Son, and Holy Spirit?

Answer: Because God has so revealed Himself in His Word[2] that these three distinct persons are the one, true, eternal God.

[1] Deut. 6:4; Is. 44:6; 45:5; I Cor. 8:4, 6. [2] Gen. 1:2, 3; Is. 61:1; 63:8-10; Matt. 3:16, 17; 28:18, 19; Luke 4:18; John 14:26; 15:26; II Cor. 13:14; Gal. 4:6; Tit. 3:5, 6.

The Heidelberg Catechism: Lord's Day 7

20. Questions: Are all men, then, saved by Christ just as they perished through
Adam?

Answer: No. Only those are saved who by a true faith are grafted into Christ and accept all His benefits.[1]

[1] Matt. 7:14; John 1:12; 3:16, 18, 36; Rom. 11:16-21.

21. Question: What is true faith?

Answer: True faith is a sure knowledge whereby I accept as true all that God has revealed to us in His Word.[1] At the same time it is a firm confidence[2] that not only to others, but also to me,[3] God has granted forgiveness of sins, everlasting righteousness, and salvation,[4] out of mere grace, only for the sake of Christ's merits.[5] This faith the Holy Spirit works in my heart by the gospel.[6]

[1] John 17:3, 17; Heb. 11:1-3; James 2:19. [2] Rom. 4:18-21; 5:1; 10:10; Heb. 4:16. [3] Gal. 2:20. [4] Rom. 1:17; Heb. 10:10. [5] Rom.3:20-26; Gal. 2:16; Eph. 2:8-10. [6] Acts 16:14; Rom. 1:16; 10:17; I Cor. 1:21.

22. Question: What, then, must a Christian believe?

Answer: All that is promised us in the gospel, [1] which the articles of our catholic and undoubted Christian faith teach us in a summary.

[1] Matt. 28:19; John 20:30, 31.

23. Question: What are these articles?

Answer: III.1.I believe in God the Father almighty, III.1. Creator of heaven and earth. III.2.I believe in Jesus Christ, III.2.His only begotten Son, our Lord; III.3.He was conceived by the Holy Spirit, III.3.born of the virgin Mary; III.4.suffered under Pontius Pilate, III.4.was crucified, dead, and buried; III.4.He descended into hell; III.5.On the third day He arose from the dead; III.6.He ascended into heaven, III.6.and sits at the right hand III.6.of God the Father almighty; III.7.from there He will come to judge III.7.the living and the dead. III.8.I believe in the Holy Spirit; III.9.I believe a holy catholic Christian church, III.9.the communion of saints; III.10.the forgiveness of sins; III.11.the resurrection of the body; III.12.and the life everlasting.