Bodily labor alleviates the pains of the mind and from this arises the happiness of the poor.
Francois De La Rochefoucauld
It is so much more difficult to live with one's body than with one's soul. One's body is so much more exacting: what it won't have it won't have, and nothing can make bitter into sweet.
D. H. Lawrence
O world, world! thus is the poor agent despised. O traitors and bawds, how earnestly are you set a-work, and how ill requited! Why should our endeavor be so loved, and the performance so loathed?