“It isn't what we say or think that defines us, but what we do.”
Variant: It is not what we think or feel that makes us who we are. It is what we do. Or fail to do...
Source: Sense and Sensibility
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Jane Austen 477
English novelist 1775–1817Related quotes

Context: To think what we do not feel is to lie to ourselves, in the same way that we lie to others when we say to others what we do not think. Everything we think must be thought with our entire being, body, and soul.
SF Giants CEO Larry Baer weighs in on MLB returning without fans https://abc7news.com/sf-giants-when-does-baseball-season-start-mlb-date-new-rules/6195145/, ABC 7 News (May 19, 2020)

“There isn't a way things should be. There's just what happens, and what we do.”
Source: A Hat Full of Sky

What do you mean by you?"
volume I; lecture 8, "Motion"; section 8-1, "Description of motion"; p. 8-2
The Feynman Lectures on Physics (1964)

“It isn't that we do what we want. It's that we're allowed to want at all.”
Source: A Great and Terrible Beauty