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X : It is an extension of the problem of choice; a man's choice depends entirely on himself, on his capacities, faculties, etc. The least of his actions is a choice, the moment he acts he has chosen, it is over. One chooses without stopping. Moreover, it is interesting to create a conflicting situation which is put into relief by a reality, the ruling of the game.
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MB : It's true that the young Pascal's calculating machine was first of all a toy to him. Montherlant considers that life should be lived as a game, and cites Schiller's phrase "Man is the full man only when he is playing".

X : Doing mathematics, physics, it's all a game; doing something we are passionate about is a game, doing something that doesn't interest us is a game in reverse, one is forced into it, otherwise one loses something else.

MB : One "plays" music . . .

X : "One plays" mathematics, "one plays" atomic bombs: one person makes it, another receives it, the whole of society and its game blends with creation.

-- Iannis Xenakis: The Man and his Music, (interviewed by Mario Bois)