Martin Luther On Presumption

“…the presumption of righteousness is the dregs of all the evils and the sin of all the sins of the world.  For all other sins and vices can be corrected, or at least prohibited by by the punishment of the magistrate.  But this sin, each man’s personal presumption of his own righteousness, peddles itself as the height of religion and sanctity, because it is impossible for the nonspiritual man to judge rightly about this issue.  Therefore this disease is the highest and greatest empire of the devil in the whole universe….”

Lectures on Galatians, Vol. 26 Luther’s Works