Human nature is generally such that it likes tranquility and dislikes anxiety; it likes leisure and dislikes toil. When the mind is always desire less, this can be called tranquility; when the body is always unoccupied, this can be called leisure.
If you set your mind free in tranquility and relinquish your body in leisure, thereby to await the direction of heaven, spontaneously happy within and free from hurry without, even the magnitude of heaven and earth cannot change you at all; even should the sun and moon be eclipsed, that does not dampen your will. Then even if you are lowly, you are as if noble; and even if you are poor, you are as if rich.
The Masters of Huainan (an early Taoist classic)