Catechism › PART THREE: LIFE IN CHRIST › CHAPTER ONE YOU SHALL LOVE THE LORD YOUR GOD WITH ALL YOUR HEART, AND WITH ALL YOUR SOUL, AND WITH ALL YOUR MIND › Article 1 THE FIRST COMMANDMENT › ¶ 2140 ¶ 2140 In Brief Since it rejects or denies the Existence of God, atheism is a sin against the first Commandment. Linked Concepts Sin Commandment Existence God ← ¶ 2139 Browse ¶ 2141 →