Thesis XII. Yet however good believers' works are, they are by no means perfect. We must notice the difference between a work that is truly good and holy and a work that is perfectly good in every respect.
We maintain that the works believers do by God's grace are truly good. We deny that they are perfectly good, so good that they lack nothing whatever.
Latin
XII. Sed quantumvis bona sint fidelium opera minime tamen perfecta sunt. Hic enim observandum est aliud esse opus vere bonum & sanctum & aliud opus perfecte & undiquaque bonum. Fidelium opera per gratiam Dei facta vere quidem bona esse asserimus. Verum negamus esse perfecte bona, & ita ut ipsis nihil omnino desit.