Heidelberg Catechism · Lord's Day 40
106. But does this commandment speak only of killing?
Answer
By forbidding murder God teaches us that he hates the root of murder, such as envy, hatred, anger, and desire of revenge, and that he regards all these as murder.
Scripture references
Proverbs 14:30 · Romans 1:29 · Romans 12:19 · Galatians 5:19-21 · 1 John 2:9-11
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