"Our lives contain so much more bad than good in part because of a series of empirical differences between bad things and good things. For example, the most intense pleasures are short-lived, whereas the worst pains can be much more enduring. Orgasms, for example, pass quickly. Gastronomic pleasures last a bit longer, but even if the pleasure of good food is protracted, it lasts no more than a few hours. Severe pains can endure for days, months, and years. Indeed, pleasures in general—not just the most sublime of them—tend to be shorter-lived than pains. Chronic pain is rampant, but there is no such thing as chronic pleasure. There are people who have an enduring sense of contentment or satisfaction, but that is not the same as chronic pleasure. Moreover, discontent and dissatisfaction can be as enduring as contentment and satisfaction; this means that the positive states are not advantaged in this realm. Indeed, the positive states are less stable because it is much easier for things to go wrong than to go right. The worst pains are also worse than the best pleasures are good. Those who deny this should consider whether they would accept an hour of the most delightful pleasures in exchange for an hour of the worst tortures. Arthur Schopenhauer makes a similar point when he asks us to “compare the respective feelings of two animals, one of which is engaged in eating the other.” The animal being eaten suffers and loses vastly more than the animal that is eating gains from this one meal. Consider too the temporal dimensions of injury or illness and recovery. One can be injured in seconds: One is hit by a bullet or projectile, or is knocked over or falls, or suffers a stroke or heart attack. In these and other ways, one can instantly lose one’s sight or hearing or the use of a limb or years of learning. The path to recovery is slow. In many cases, full recovery is never attained. Injury comes in an instant, but the resultant suffering can last a lifetime. Even lesser injuries and illnesses are typically incurred much more quickly than one recovers from them. For example, the common cold strikes quickly and is defeated much more slowly by one’s immune system. The symptoms manifest with increasing intensity within hours, but they take at least days, if not weeks, to disappear entirely."