WCF 20.2.
God alone is Lord of the conscience, (James 4:12, Rom. 14:4) and hath left it free from the doctrines and commandments of men, which are, in any thing, contrary to His Word; or beside it, if matters of faith, or worship. (Acts 4:19, Acts 5:29, 1 Cor. 7:23, Matt. 23:8–10, 2 Cor. 1:24, Matt. 15:9) So that, to believe such doctrines, or to obey such commands, out of conscience, is to betray true liberty of conscience: (Col. 2:20, 22–23, Gal. 1:10, Gal. 2:4–5, Gal. 5:1) and the requiring of an implicit faith, and an absolute and blind obedience, is to destroy liberty of conscience, and reason also. (Rom. 10:17, Rom. 14:23, Isa. 8:20, Acts 17:11, John 4:22, Hos. 5:11, Rev. 13:12, 16–17, Jer. 8:9)