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Be not as one that hath ten thousand years to live; death is nigh at hand: while thou livest, while thou hast time, be good.

"Meditations". Book by Marcus Aurelius, Book IV, 17. "Bartlett's Familiar Quotations, 10th edition", 1919.
Be not as one that hath ten thousand years to live; death is nigh at hand: while thou livest, while thou hast time, be good.