“Let us assume that we invited an unknown person to a game of cards. If this person answered us, “I don’t play,” we would either interpret this to mean that he did not understand the game, or that he had an aversion to it which arose from economic, ethical, or other reasons. Let us imagine, however, that an honorable man, who was known to possess every possible skill in the game, and who was well versed in its rules and its forbidden tricks, but who could like a game and participate in it only when it was an innocent pastime, were invited into a company of clever swindlers, who were known as good players and to whom he was equal on both scores, to join them in a game. If he said, “I do not play,” we would have to join him in looking the people with whom he was talking straight in the face, and would be able to supplement his words as follows: “I don’t play, that is, with people such as you, who break the rules of the game, and rob it of its pleasure. If you offer to play a game, our mutual agreement, then, is that we recognize the capriciousness of chance as our master; and you call the science of your nimble fingers chance, and I must accept it as such, it I will, or run the risk of insulting you or choose the shame of imitating you.” … The opinion of Socrates can be summarized in these blunt words, when he said to the Sophists, the leaned men of his time, “I know nothing.””
Therefore these words were a thorn in their eyes and a scourge on their backs.
Socratic Memorabilia, J. Flaherty, trans. (Baltimore: 1967), pp. 165-167.
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Johann Georg Hamann 13
German philosopher 1730–1788Related quotes

Even if we knew every rule, however, we might not be able to understand why a particular move is made in the game, merely because it is too complicated and our minds are limited. If you play chess you must know that it is easy to learn all the rules, and yet it is often very hard to select the best move or to understand why a player moves as he does. So it is in nature, only much more so.
volume I; lecture 2, "Basic Physics"; section 2-1, "Introduction"; p. 2-1
The Feynman Lectures on Physics (1964)

volume I; lecture 2, "Basic Physics"; section 2-1, "Introduction"; p. 2-1
The Feynman Lectures on Physics (1964)

Josh Billings on Ice, and Other Things https://archive.org/details/joshbillingsoni00billgoog (1868), Chapter XXIV: "Perkussion Caps", p. 89; republished in The Complete Works of Josh Billings http://www.gutenberg.org/ebooks/36556 (1876), Chapter 141: "Ods and Ens", p. 248. Often paraphrased as "Life consists not in holding good cards but in playing those you hold well."

The Alphabet of Grace (1970)

“I can't imagine a person becoming a success who doesn't give this game of life everything hes got.”
Source: Free the Airwaves! (2002)

On life in hiding from Nazi authorities during World War II, p. 48
To Save a Life: Stories of Holocaust Rescue (2000)
Context: I lived altogether in nine different places while in hiding, because whenever something happened, either someone betrayed the place or something happened to someone who knew where I was, I had to move. The rule of the game was never assume that anybody, however honorable, would be able to stand up under torture. If Mr. X, who knew where I was, was caught for some reason, I should move.
Source: Trent's Last Case (1912), Chapter XV: "Double Cunning"
Improvisation for the Theater 1963), page 4