Play (n.) is at the root of the universe for the hindus: For them it is not the work of God, but the 'play' of God... a kind of dance.
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Play (n.) is not to be taken seriously — and neither are the social conventions that pass for our ideas of the world and of ourselves.
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Play (n.) of any kind, done without ulterior motive or second thought, makes us feel guilty, and many believe such unmotivated action is impossible.
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Play (n.) done to be refreshed for work is not play — and no work is finely done unless it, too, is a form of play.
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Play (n.) in children has its own seriousness, but the child knows it is only playing, so its gravity is a roundabout kind of fun.