---
title: "Question 40: What did God at first reveal to man for the rule of his obedience? | Westminster Shorter Catechism"
description: "Westminster Shorter Catechism, question 40: What did God at first reveal to man for the rule of his obedience? The rule which God at first revealed to man for his obedience, was the moral law.Scripture proofs: Rom. 2:14-15; Rom. 10:5."
canonical: "https://ctkrp.org/shorter-catechism/question-40-what-did-god-at-first-reveal-to-man-for/"
source: "https://ctkrp.org/assets/rpcna-constitution-2026.pdf#page=164"
---

# Question 40: What did God at first reveal to man for the rule of his obedience? | Westminster Shorter Catechism

The rule which God at first revealed to man for his obedience, was the moral law.

Scripture proofs: Rom. 2:14-15; Rom. 10:5.

Original source: [2026 RPCNA Constitution](https://ctkrp.org/assets/rpcna-constitution-2026.pdf#page=164)

## Related reading

- [What does “Reformed” mean?](https://ctkrp.org/learn/what-is-reformed/)
- [Westminster Confession of Faith · Chapter 19: Of the Law of God](https://ctkrp.org/confession/chapter-19-law-of-god/)
- [Westminster Shorter Catechism · Question 39: What is the duty which God requireth of man?](https://ctkrp.org/shorter-catechism/question-39-what-is-the-duty-which-god-requireth-of-man/)
- [Westminster Larger Catechism · Question 91: What is the duty which God requireth of man?](https://ctkrp.org/larger-catechism/question-91-what-is-the-duty-which-god-requireth-of-man/)
- [Question 39](https://ctkrp.org/shorter-catechism/question-39-what-is-the-duty-which-god-requireth-of-man/)
- [Question 41](https://ctkrp.org/shorter-catechism/question-41-where-is-the-moral-law-summarily-comprehended/)

Canonical page: https://ctkrp.org/shorter-catechism/question-40-what-did-god-at-first-reveal-to-man-for/