“ To sleep, perchance to dream—ay, there’s the rub, For in that sleep of death what dreams may come, When we have shuffled off this mortal coil, Must give us pause. There’s the respect That makes calamity of so long life. ”
 William Shakespeare, Hamlet (1623). copy citation

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“To be, or not to be, that is the question: Whether ’tis nobler in the mind to suffer The slings and arrows of outrageous fortune, Or to take arms against a sea of troubles, And by opposing end them? To die—to sleep, No more; and by a sleep to say we end The heart-ache, and the thousand natural shocks That flesh is heir to: ’tis a consummation Devoutly to be wish’d. To die, to sleep. To sleep, perchance to dream—ay, there’s the rub, For in that sleep of death what dreams may come, When we have shuffled off this mortal coil, Must give us pause. There’s the respect That makes calamity of so long life. For who would bear the whips and scorns of time, The oppressor’s wrong, the proud man’s contumely, The pangs of dispriz’d love, the law’s delay, The insolence of office, and the spurns That patient merit of the unworthy takes, When he himself might his quietus make With a bare bodkin?” source