Faith is never identical with piety even if it were the purest and finest.
Exactly halfway between exegesis and practical theology stands dogmatics.
Grace and gratitude belong together like heaven and earth. Gratitude evokes grace like the voice and echo. Gratitude follows grace as thunder follows lightning.
In dogmatics our question is: What are we to think and say?
Sin is not confined to the evil things we do. It is the evil within us, the evil which we are.
Belief cannot argue with unbelief, it can only preach to it.