A life too full of excitement is an exhausting life, in which continually stronger stimuli are needed to give the thrill that has come to be thought an essential part of pleasure. A person accustomed to too much excitement is like a person with a morbid craving for pepper, who comes at last to be unable even to taste a quantity of pepper which would cause anyone else to choke. There is an element of boredom which is inseparable from the avoidance of too much excitement, and too much excitement not only undermines the health, but dulls the palate for every kind of pleasure, substituting titillations for profound organic satisfactions, cleverness for wisdom, and jagged surprises for beauty… A certain power of enduring boredom is therefore essential to a happy life, and is one of the things that ought to be taught to the young.