Article XI. Of Works of Supererogation

Voluntary works—besides, over, and above God's commandments—which are called works of supererogation, can not be taught without arrogancy and impiety. For by them men do declare that they do not only render unto God as much as they are bound to do, but that they do more for his sake than of bounden duty is required: whereas Christ saith plainly, When ye have done all that is commanded you, say, We are unprofitable servants.