“For it would be better to die once and for all than to suffer pain for all one's life.”
κρεῖσσον γὰρ εἰσάπαξ θανεῖν
ἢ τὰς ἁπάσας ἡμέρας πάσχειν κακῶς.
Variant translation by John Stuart Blackie (1850):
"Life and life's sorrows? Once to die is better
Than thus to drag sick life."
Source: Prometheus Bound, lines 750–751
Original
κρεῖσσον γὰρ εἰσάπαξ θανεῖν<br/>ἢ τὰς ἁπάσας ἡμέρας πάσχειν κακῶς.
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Aeschylus 119
ancient Athenian playwright -525–-456 BCRelated quotes

The Awakening (1899)
Source: The Awakening, and Selected Stories
Context: The years that are gone seem like dreams -if one might go on sleeping and dreaming- but to wake up and find -oh! well! perhaps it is better to wake up after all, even to suffer, rather than to remain a dupe to illusions all ones life.

1900s, The Moral Equivalent of War (1906)
Context: There is nothing to make one indignant in the mere fact that life is hard, that men should toil and suffer pain. The planetary conditions once for all are such, and we can stand it. But that so many men, by mere accidents of birth and opportunity, should have a life of nothing else but toil and pain and hardness and inferiority imposed upon them, should have no vacation, while others natively no more deserving never get any taste of this campaigning life at all, — this is capable of arousing indignation in reflective minds. It may end by seeming shameful to all of us that some of us have nothing but campaigning, and others nothing but unmanly ease. If now — and this is my idea — there were, instead of military conscription, a conscription of the whole youthful population to form for a certain number of years a part of the army enlisted against Nature, the injustice would tend to be evened out, and numerous other goods to the commonwealth would remain blind as the luxurious classes now are blind, to man's relations to the globe he lives on, and to the permanently sour and hard foundations of his higher life.

“Better to suffer than to die: that is mankind's motto.”
Plutôt souffrir que mourir,
C'est la devise des hommes.
Book I (1668), fable 16.
Fables (1668–1679)
Variant: Rather suffer than die is man's motto.

Manuel, in Ch. I : How Manuel Left the Mire
Figures of Earth (1921)
Context: I shall not ever return to you, my pigs, because, at worst, to die valorously is better than to sleep out one's youth in the sun. A man has but one life. It is his all. Therefore I now depart from you, my pigs, to win me a fine wife and much wealth and leisure wherein to discharge my geas. And when my geas is lifted I shall not come back to you, my pigs, but I shall travel everywhither, and into the last limits of earth, so that I may see the ends of this world and may judge them while my life endures. For after that, they say, I judge not, but am judged: and a man whose life has gone out of him, my pigs, is not even good bacon.

“Better to die fighting for freedom then be a prisoner all the days of your life.”