“Life is like that. You live it forward but understand it backward.”
Variant: You live it forward, but understand it backward.
Source: Cutting for Stone
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Abraham Verghese 20
Physician, teacher, novelist 1955Related quotes

“Life can only be understood backwards; but it must be lived forwards.”
Variant: Life can only be understood going backward, but must be lived going forward.
“Life can only be understood looking backward. It must be lived forward.”
Source: The Curious Case of Benjamin Button Screenplay
“Though life has to be lived forward, it can only be understood backwards”
Source: Chinese Cinderella: The True Story of an Unwanted Daughter

“Life can only be understood backward; the trouble is, it has to be lived forward.”
In The Light of what We Know (2014)

“Life swings like a pendulum backward and forward between pain and boredom.”

Journals IV A 164 (1843)
See Phenomenology: Critical Concepts in Philosophy, by Dermot Moran (2002)
Variants:
We live forward, but we understand backward.
Life can only be understood backwards; but it must be lived forwards.
1840s, The Journals of Søren Kierkegaard, 1840s