There is no deeper pathos in the spiritual life of man than the cruelty of the “righteous” people. If any one idea dominates the teachings of Jesus, it is his opposition to the self-righteousness of the “righteous.”
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Gender-inclusive version:

There is no deeper pathos in the spiritual life of human beings than the cruelty of the “righteous” people. If any one idea dominates the teachings of Jesus, it is his opposition to the self-righteousness of the “righteous.”