The first commandment forbiddeth the denying, or not worshipping and glorifying, the true God as God, and our God; and the giving of that worship and glory to any other, which is due to him alone.
Scripture proofs: Ps. 14:1; Rom. 1:21; Ps. 81:10-11; Rom. 1:25-26.
Source: The Constitution of the Reformed Presbyterian Church of North America, updated 2026, C-6.