Being by his faith replaced afresh in paradise and created anew, he (the believer)does not need works for his justification, but that he may not be idle, but that he may exercise his own body and preserve it. His works are to be done freely, with the sole object of pleasing God.

First Principles of the Reformation, Or, The Ninety-five Theses and the Three Primary Works of Martin Luther (ed. 1883)