This volume is the fifth and final volume in the Blessed John Duns Scotus Opera philosophica series, which originated at the Franciscan Institute at St. Bonaventure University and is now copublished by CUA Press. The present volume offers readers Scotus's questions on Aristotle's De anima wherein he focuses his attention upon the faculties of sensation, the nature of the intellect, the role of the intelligible species in cognition, and the formal object of the intellect.