Luther’s Works, Volume 34 is unavailable, but you can change that!

Included in this volume therefore are four of the debates or disputations held in Wittenberg University between 1535 and 1542. Thirteen of the fourteen treatises appear in their entirety in an English translation for the first time with publication of this volume.

natural powers remain undiminished after sin in men as well as in demons.6 15. They are more correct who firmly confess that human nature has been corrupted through Adam’s sin.7 16. For human nature cannot be understood to be corrupt and untainted at the same time, unless they are speaking of the unimpaired condition of animal powers, which, however, they do not do. 17. Notwithstanding, it is certain enough to the believers that neither animal nor rational powers have been left undiminished.
Volume 34, Page 155