“There isn't a way things should be. There's just what happens, and what we do.”

Hays translation
Source: Meditations (c. AD 121–180), Book IX, 42

Source: The Tao of Pooh

The Man in the High Castle (1962)

Source: Reasons to Live

Source: The Happiness Project: Or Why I Spent a Year Trying to Sing in the Morning, Clean My Closets, Fight Right, Read Aristotle, and Generally Have More Fun

Source: Fight Club

The Circle, p. 21
Catching the Big Fish (2006)
Context: I like the saying "The world is as you are." And I think films are as you are. That's why, although the frames of a film are always the same — the same number, in the same sequence, with the same sounds — every screening is different. The difference is sometimes subtle but it's there. It depends on the audience. There is a circle that goes from the audience to the film and back. Each person is looking and thinking and feeling and coming up with his or her own sense of things. And it's probably different from what I fell in love with.
So you don’t know how it's going to hit people. But if you thought about how it's going to hit people, or if it's going to hurt someone, or if it's going to do this or do that, then you would have to stop making films. You just do these things that you fall in love with, and you never know what's going to happen.

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