  Hume allows that, speaking imprecisely, we often say a passion is unreasonable because it arises in response to a mistaken judgment or opinion, either that something (a source of pleasure or uneasiness) exists, or that it may be obtained or avoided by a certain means. In just these two cases a passion may be called unreasonable, but strictly speaking even here it is not the passion but the judgment that is so. Once we correct the mistaken judgment, “our passions yield to our reason without any opposition,” so there is still no combat of passion and reason (T 2.3.3.7). And there is no other instance of passion contrary to reason. Hume famously declaims, “’Tis not contrary to reason to prefer the destruction of the whole world to the scratching of my finger. ‘Tis not contrary to reason for me to chuse my total ruin, to prevent the least uneasiness of an Indian or person wholly unknown to me. ‘Tis as little contrary to reason to prefer even my own acknowledg’d lesser good to my greater, and have a more ardent affection for the former than for the latter.” (2.3.3.6)