Bonhoeffer on Grace & Repentance

"The world upon whom grace is thrust as a bargain will grow tired of it, and will not only trample upon the Holy, but also will tear apart those who force it on them.  For its own sake, for the sake of the sinner, and for the sake of the community, the Holy is to be protected from cheap surrender.  The Gospel is protected by the preaching of repentance which calls sin sin and declares the sinner guilty.  The key to loose is protected by the key to bind. The preaching of grace can only be protected by the preaching of repentance."

- Dietrich Bonhoeffer
Quoted from "Bonhoeffer" by Eric Metaxas, pg. 293