Heidelberg Catechism · Lord's Day 33
91. But what are good works?
Answer
Only those which are done out of true faith, in accordance with the law of God, and to his glory, and not those based on our own opinion or on the precepts of men.
Scripture references
Romans 14:23 · 1 Samuel 15:22 · 1 Corinthians 10:31 · Deuteronomy 12:32 · Matthew 15:9 · Isaiah 29:13
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