“The very center and core of the whole Bible is the doctrine of the grace of God—the grace of God which depends not one whit upon anything that is in [us], but is absolutely undeserved, resistless and sovereign.... Christian experience also depends for its depth and for its power upon the way in which that blessed doctrine is cherished in the depths of the heart. The center of the Bible, and the center of Christianity, is found in the grace of God.”

— J. Gresham Machen