The sinfulness of that estate whereinto man fell, consists in the guilt of Adam’s first sin, the want of original righteousness, and the corruption of his whole nature, which is commonly called original sin; together with all actual transgressions which proceed from it.
Scripture proofs: Rom. 5:12, 19; Rom. 5:10-20; Eph. 2:1-3; Jas. 1:14-15; Matt. 15:19.
Source: The Constitution of the Reformed Presbyterian Church of North America, updated 2026, C-3.