In honor of Reformation Day, here are a few choice quotes on the subject by CH Spurgeon:
"Sinners—you must either be cursed of God, or else you must accept Christ, as bearing the curse instead of you. I do beseech you, as you love your souls, if you have any sanity left, accept this blessed and divinely-appointed way of salvation. This is the truth which the apostles preached, and suffered and died to maintain; it is this for which the Reformers struggled; it is this for which the martyrs burned at Smithfield; it is the grand basis doctrine of the Reformation, and the very truth of God."
"This one sentence, “The just shall live by his faith,” produced the Reformation. Out of this one line, as from the opening of one of the Apocalyptic seals, came forth all that sounding of gospel trumpets, and all that singing of gospel songs, which made in the world a sound like the noise of many waters. This one seed, forgotten and hidden away in the dark mediæval times, was brought forth, dropped into the human heart, made by the Spirit of God to grow, and in the end to produce great results."