In the first half of Part 5 of the Ethics, Spinoza presents his directions for mitigating the passions through reason. He touts his account of the power of reason over the passions as ground-breaking and unique, while positioning himself squarely within the traditional debate of akrasia, or weakness of will. Spinoza claims he is the first to identify the affects through their characteristic effects, and demonstrate the way these effects can be countered by the mind’s activity. It follows that Spinoza’s (...) claim for originality can be explained in (at least) two ways: first, passions themselves have been misunderstood, and second, previous philosophers have misunderstood the relationship between reason and the passions. In the first part of this paper, I place Spinoza’s discussion of the passions and reason’s power over them in a historical context. Next, I present Spinoza’s definition of the affects, and his directions for ‘destroying’ the passions. In the third section I point to the differences between my interpretation and that of recent commentators. Finally, I discuss the way in which Spinoza’s directions for mitigating the passions serve as the psychological basis for his moral theory. (shrink)