Heidelberg Catechism · Lord's Day 25
65. Since, then, faith alone makes us share in Christ and all his benefits, where does this faith come from?
Answer
From the Holy Spirit, who works it in our hearts by the preaching of the holy gospel, and confirms it by the use of the holy sacraments.
Scripture references
Ephesians 2:8 · Ephesians 6:23 · John 3:5 · Philippians 1:29 · Romans 10:17 · Matthew 28:19-20
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