Against the exclusiveness of the paradigm of work as activity, first of all, there is leisure as "non-activity" — an inner absence of preoccupation, a calm, an ability to let things go, to be quiet.
Leisure is a form of that stillness that is the necessary preparation for accepting reality; only the person who is still can hear, and whoever is not still, cannot hear. […] Leisure is the disposition of receptive understanding, of contemplative beholding, and immersion — in the real.

Leisure is permissible, we understand, because it costs money; idleness is not, because it doesn’t. Leisure is focused; whatever thinking it requires is absorbed by a certain task: sinking that putt, making that cast, watching that flat-screen TV. Idleness is unconstrained, anarchic. Leisure—particularly if it involves some kind of high-priced technology—is as American as a Fourth of July barbecue. Idleness, on the other hand, has a bad attitude. It doesn’t shave; it’s not a member of the team; it doesn’t play well with others. It thinks too much, as my high school coach used to say. So it has to be ostracized.

Leisure is the prerequisite of every free thought, every free activity. And this is why only the few are capable of it, since the many, when they have gained time, only kill it.

A life of slothful ease, a life of that peace which springs merely from lack either of desire or of power to strive after great things, is as little worthy of a nation as of an individual. [...] If you are rich and are worth your salt, you will teach your sons that though they may have leisure, it is not to be spent in idleness; for wisely used leisure merely means that those who possess it, being free from the necessity of working for their livelihood, are all the more bound to carry on some kind of non-remunerative work in science, in letters, in art, in exploration, in historical research—work of the type we most need in this country, the successful carrying out of which reflects most honor upon the nation. We do not admire the man of timid peace. We admire the man who embodies victorious effort; the man who never wrongs his neighbor, who is prompt to help a friend, but who has those virile qualities necessary to win in the stern strife of actual life. It is hard to fail, but it is worse never to have tried to succeed. In this life we get nothing save by effort. Freedom from effort in the present merely means that there has been stored up effort in the past. A man can be freed from the necessity of work only by the fact that he or his fathers before him have worked to good purpose. If the freedom thus purchased is used aright, and the man still does actual work, though of a different kind, whether as a writer or a general, whether in the field of politics or in the field of exploration and adventure, he shows he deserves his good fortune. But if he treats this period of freedom from the need of actual labor as a period, not of preparation, but of mere enjoyment, even though perhaps not of vicious enjoyment, he shows that he is simply a cumberer of the earth's surface, and he surely unfits himself to hold his own with his fellows if the need to do so should again arise.

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.

Whoever is not in the possession of leisure can hardly be said to possess independence. They talk of the dignity of work. Bosh. True Work is the necessity of poor humanity's earthly condition. The dignity is in leisure. Besides, 99 hundreths of all the work done in the world is either foolish and unnecessary, or harmful and wicked.

Is not true leisure
One with true toil?

We see first of all that leisure, instead of being a vacuum representing a break with society, is literally stuffed with technical mechanisms of compensation and integration. It is not a vacuous interval. It is not a human kind of emptiness in which decisions might be matured. Leisure time is a mechanized time and is exploited by techniques which, although different from those of man's ordinary work, are as invasive, exacting, and leave man no more free than labor itself.

"We work in order to be at leisure." […] Doesn't this statement appear almost immoral to the man or woman of the world of "total work"? Is it not an attack on the basic principles of human society?
Now I have not merely constructed a sentence to prove a point. The statement was actually made — by Aristotle [Nichomachean Ethics X, 7 (1177b4–6)]. Yes, Aristotle: the sober, industrious realist, and the fact that he said it, gives the statement special significance. What he says in a more literal translation would be: "We are not-at-leisure in order to be-at-leisure." For the Greeks, "not-leisure" was the word for the world of everyday work; and not only to indicate its "hustle and bustle," but the work itself. The Greek language had only this negative term for it (ά-σχολία), as did Latin (neg-otium).
The context not only of this sentence but also of another one from Aristotle's Politics (stating that the "pivot" around which everything turns is leisure [Politics VII, 3 (1337b33)]) shows that these notions were not considered extraordinary, but only self-evident. […] Could this also imply that people in our day no longer have direct access to the original meaning of leisure?

On the whole, the enjoyment of leisure is something which decidedly costs less than the enjoyment of luxury. All it requires is an artistic temperament which is bent on seeking a perfectly useless afternoon spent in a perfectly useless manner.

In leisure — not only there, but certainly there, if anywhere — the truly human is rescued and preserved precisely because the area of the "just human" is left behind over and over again — and this is not brought about through the application of extreme efforts but rather as with a kind of "moving away" (and this "moving" is of course more difficult than the extreme, active effort; it is "more difficult" because it is less at one's own disposal; the condition of utmost exertion is more easily to be realized than the condition of relaxation and detachment, even though the latter is effortless: this is the paradox that reigns over the attainment of leisure, which is at once a human and superhuman condition). As Aristotle said of it: "man cannot live this way insofar as he is man, but only insofar as something divine dwells in him." [Nichomachean Ethics X, 7 (1177b27–28)]

We can begin, like the Scholastic masters, with an objection: videtur quod non … "It seems not to be true that ..." And this is the objection: a time like the present [i.e., a few years after the Second World War, in Germany] seems, of all times, not to be a time to speak of leisure. […]
That is no small objection. But there is also a good answer to it. […]
For, when we consider the foundations of Western European culture (is it, perhaps, too rash to assume that our re-building will in fact be carried out in a "Western" spirit? Indeed, this and no other is the very assumption that is at issue today), one of these foundations is leisure. We can read it in the first chapter of Aristotle's Metaphysics. And the very history of the meaning of the word bears a similar message. The Greek word for leisure (σχολή) is the origin of Latin scola, German Schule, English school. The names for the institutions of education and learning mean "leisure."

In the effort to regain a space of true leisure, to bring about a fundamentally correct attitude and "exercise" of leisure, the real difficulty of this so-often despaired-of project consists in the fact that the ultimate root of leisure lies outside the range of our responsible, voluntary action. The fullest harmony with the world, to be precise, cannot come about on the basis of a voluntary decision. Above all, one cannot simply "make" it happen for some ulterior purpose. There are certain things which one cannot do "in order to ..." do something else.

This is the main question, with what activity one’s leisure is filled.