1956 - 1967
Source: the 'Ad Reinhardts Papers', Archives of American Art, microfilm no. N/69-103, frame no. 268
“Don’t say: “They must have something in common, or they would not be called ‘games’” but look and see whether there is anything common to all. For if you look at them, you won’t see something that is common to all, but similarities, affinities, and a whole series of them at that. To repeat: don’t think, but look!”
§ 66
Philosophical Investigations (1953)
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Ludwig Wittgenstein 228
Austrian-British philosopher 1889–1951Related quotes
As quoted in "How Dinosaurs Loved: An Interview with Dr. Mark Norell on Dino Relations" http://motherboard.vice.com/blog/t-rexxx-how-dinosaurs-lived-loved-and-tasted-q-a-with-dr-mark-norell-american-museum-of-natural-history, Vice (March 20, 2012)

“Hey! What are you looking at? Don’t you see that it’s about you?”
Zen ni kike (To you) (Tokyo: Daihorinkaku, 1987)

Savannah Lynn Curtis, Chapter 4, p. 71
Variant: ... when you're struggling with something, look at all the people around you and realize that every single person you see is struggling with something, and to them, it's just as hard as what you're going through.
Source: 2000s, Dear John (2006)

“If you think something is ugly, look harder. Ugliness is just a failure of seeing.”
Source: The Humans
Basil Bunting on Poetry ed Peter Makin, The Johns Hopkins University Press; New edition (1 Oct 2003) ISBN 978-0801877506