By this faith, a Christian believes to be true whatsoever is revealed in the Word, for the authority of God Himself speaking therein; and acts differently upon that which each particular passage thereof contains; yielding obedience to the commands, trembling at the threatenings, and embracing the promises of God for this life, and that which is to come. But the principal acts of saving faith are accepting, receiving, and resting upon Christ alone for justification, sanctification, and eternal life, by virtue of the covenant of grace.

—Westminster Confession of Faith 14.2 (HT: Chris Hutchinson)