“Life is but a moment. Death is but a moment, too.”
Das Leben ist Nur ein Moment, der Tod ist auch nur einer!
Maria Stuart, Act III, sc. vi (1800)
Original
Das Leben ist Nur ein Moment, der Tod ist auch nur einer!
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Friedrich Schiller 111
German poet, philosopher, historian, and playwright 1759–1805Related quotes

“Every thought about death takes a moment of life away.”
Death http://www.poetrysoup.com/famous/poem/21379/Death
From the poems written in English
“If I can rejoice for a moment,
Death at an early age would still be a long life.”
"Miscellaneous Poems" III, quoted in Albert Davis (ed.), The Penguin Book of Chinese Verse (1962), p. 67

Source: The Tales of Alvin Maker, Red Prophet (1988), Chapter 17.

“One doesn't recognize the really important moments in one's life until it's too late.”

“Thou wast indeed fortunate, Agricola, not only in the splendour of thy life, but in the opportune moment of thy death.”
Tu vero felix, Agricola, non vitae tantum claritate, sed etiam opportunitate mortis.
http://www.unrv.com/tacitus/tacitus-agricola-12.php
Source: Agricola (98), Chapter 45

“Life is a collection of moments. Mindfulness is beautification of the moments.”
Mindfulness Living in the Moment - Living in the Breath (2015)

1836
Notebooks, The American Notebooks (1835 - 1853)