Work is the antonym of free time. But not of leisure. Leisure and free time live in two different worlds. We have got into the habit of thinking them the same. Anybody can have free time. Free time is a realizable idea of democracy. Leisure is not fully realizable, and hence an ideal not alone an idea. Free time refers to a special way of calculating a special kind of time. Leisure refers to a state of being, a condition of man, which few desire and fewer achieve.

Of Time, Work, and Leisure (1962)