WHEN DOING THINGS to cause myself physical and mental discomfort, I view myself—or at any rate, a part of me—as an opponent in a kind of game. This opponent—my “other self,” as it were—is on evolutionary autopilot: He wants nothing more than to be comfortable and to take advantage of whatever opportunities for pleasure present themselves. My other

Epictetus takes Seneca’s bedtime-meditation advice one step further: He suggests that as we go about our daily business, we should simultaneously play the roles of participant and spectator.3 We should, in other words, create within ourselves a Stoic observer who watches us and comments on our attempts to practice Stoicism. Along similar lines,

This means that besides finding a way to forestall the adaptation process, we need to find a way to reverse it. In other words, we need a technique for creating in ourselves a desire for the things we already have. Around the world and throughout the millennia, those who have thought carefully about the workings of desire have recognized this—that

THE STOICS THOUGHT they had an answer to this question. They recommended that we spend time imagining that we have lost the things we value—that our wife has left us, our car was stolen, or we lost our job. Doing this, the Stoics thought, will make us value our wife, our car, and our job more than we otherwise would. This technique—let us refer to

Although the Stoics were not the first to do logic—Aristotle, for example, had done it before them, as had the Megarians—Stoic logic showed an unprecedented degree of sophistication. The Stoics’ interest in logic is a natural consequence of their belief that man’s distinguishing feature is his rationality. Logic is, after all, the study of the

We are social creatures; we will be miserable if we try to cut off contact with other people. Therefore, if what we seek is tranquility, we should form and maintain relations with others. In doing so, though, we should be careful about whom we befriend. We should also, to the extent possible, avoid people whose values are corrupt, for fear that

When, as the result of being exposed to luxurious living, people become hard to please, a curious thing happens. Rather than mourning the loss of their ability to enjoy simple things, they take pride in their newly gained inability to enjoy anything but “the best.” The Stoics, however, would pity these individuals. They would point out that by

According to Diogenes, early Western philosophy had two separate branches.1 One branch—he calls it the Italian branch—began with Pythagoras. If we follow through the various successors of Pythagoras, we ultimately come to Epicurus, whose own school of philosophy was a major rival to the Stoic school. The other branch—Diogenes calls it the Ionian

By contemplating the impermanence of everything in the world, we are forced to recognize that every time we do something could be the last time we do it, and this recognition can invest the things we do with a significance and intensity that would otherwise be absent.