The secure and FALSE Christians, who are always more than the true believers, have no correct information concerning faith, for they think if they straightway fall into and continue in sin-yet they only believe-then there is no danger, for faith alone justifies without any good works. In that, they rest. They do nothing good, yea, only evil, and for all that, they wish to be Christians. But they are worse than the heathen. However, we heard above that faith begets new men and makes all things new in the heart, mind, and senses. These new men then as a good tree, bear good fruit, and lead a holy life. Where this is not the case, there is no true faith.
-Martin Luther