Promissio: The Reformational Turn in Luther's Theology

"Bayer dates Luther's reformational breakthrough to the early spring of 1518, when he discovered the sacramentality of the word: that the word is not simply informative but performative, and constitutive of the sacraments. The preached word is prior to faith, creates faith, and is the only source of certainty in the Christian life"-- Provided by publisher.