"To mind your own business incorporates the whole duty of man."

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Men should soon make up their minds to be forgotten, and look about them, or within them, for some higher motive in what they do than the approbation of men, which is fame, namely, their duty; that they should be constantly and quietly at work, each in his sphere, regardless of effects, and leaving their fame to take care of itself.

— Henry Wadsworth Longfellow