If all else fails, the character of a man can be recognized by nothing so surely as by a jest which he takes badly.
Variants
A person reveals his character by nothing so clearly as the joke he resents.
The human tendency to regard little things as important has produced very many great things.
Nothing can contribute more to peace of soul than the lack of any opinion whatever.
Even truth needs to be clad in new garments if it is to appeal to a new age.
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