" When our emotions form a terminal desire, we feel motivated to fulfill it: to do so will feel good, or at any rate, will feel better than not fulfilling it. But what about the instrumental desires our intellect forms so we can fulfill this terminal desire? Fulfillment of these instrumental desires won’t itself feel good; indeed, for the pre-law student to drag himself out of bed will feel distinctly bad. More generally, although the objects of terminal desires formed by the emotions are inherently desirable, the objects of instrumental desires formed by the intellect aren’t. What is it, then, that motivates us to fulfill these instrumental desires? "

― William B. Irvine , On Desire: Why We Want What We Want