We are not to look upon our sins as insignificant trifles. On the other hand, we are not to regard them as so terrible that we must despair. Learn to believe that Christ was given, not for picayune and imaginary transgressions, but for mountainous sins; not for one or two, but for all; not for sins that can be discarded, but for sins that are stubbornly ingrained.
Martin LutherFor from the error of not knowing, or understanding, what sin is, there necessarily arises another error, that people cannot know or understand what grace is.
Martin LutherIf then, Moses so distinctly announces that there is in us not only a faculty, but also a facility for keeping all commandments, why are we sweating so much? ... What need is there now of Christ or of Spirit? We have found a passage that asserts freedom of choice, but also distinctly teaches that the keeping of the commandments is easy.
Martin Luther