Slavery is a weed that grows on every soil. Burke.
Slavery is an inherent inheritance of a large portion of the human race, to whom the more you give of their own free will, the more slaves they will make themselves. Ruskin.
Slaves cannot breathe in England; if their 35 lungs / Receive our air, that moment they are free; / They touch our country, and their shackles fall. Cowper.
Sleep after toil, port after stormy seas, / Ease after war, death after life, doth greatly please. Spenser.
Sleep and death, two twins of winged race, / Of matchless swiftness, but of silent pace. Pope's Homer.
Sleep, gentle sleep, / Nature's soft nurse, how have I frighted thee, / That thou no more wilt weigh my eyelids down, / And steep my senses in forgetfulness? 2 Hen. IV., iii. 1.
Sleep hath its own world, / A boundary between the things misnamed / Death and Existence. Byron.
Sleep is for the inhabitants of planets only; in 40 another time men will sleep and wake continually at once. The great part of our body, of our humanity, yet sleeps a deep sleep. (?)
Sleep is the best cure for waking troubles. Cervantes.
Sleep is the sole reviver (Labsal) of the afflicted. Platen.