"Suffering is nature's way of indicating a mistaken attitude or way of behavior, and to the nonegocentric person every moment of suffering is the opportunity for growth. People should rejoice in suffering, strange as it sounds, for this is a sign of the availability of energy to transform their characters."

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Whoever hesitates while waiting for ideas to triumph among the masses before initiating revolutionary action will never be a revolutionary... Humanity will, of course, change; human society will, of course, continue to develop - in spite of men and the errors of men. But that is not a revolutionary attitude.

— Fidel Castro