The Heidelberg Catechism

Lord’s Day 37Questions 100–102

Reformed Church in America English, 1879

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Text public domain · U.S.

1879 Reformed Church in America Q&A text with inline proof references. Source: Wikisource scan transcription.

This English edition was published in the United States in 1879, before the current U.S. public-domain cutoff. Rights evidence. Verified 2026-07-14.

100

Is then the profaning of God’s name, by swearing and cursing, so heinous a sin, that his wrath is kindled against those who do not endeavour, as much as in them lies, to prevent and forbid such cursing and swearing?

It undoubtedly is; for there is no sin greater or more provoking to God, than the profaning of his name (Lev. 24;15), and therefore he has commanded this sin to be punished with death (Lev. 24;16).

101

May we then swear religiously by the name of God?

Yes: either when the magistrates demand it of the subjects (Ezra 10;5); or when necessity requires us thereby to confirm fidelity and truth, to the glory of God, and the safety of our neighbours (Josh. 9;19); for such an oath is founded on God’s word, and therefore was justly used by the saints, both in the old and new testament (Heb. 6;16).

102

May we also swear by saints, or any other creatures?

No; for a lawful oath is a calling upon God, as the one who knows the heart (1 Kings 8;39), that he will bear witness to the truth, and punish me if I swear falsely: which honor is due to no creature (2 Cor. 1;23).