The wise man knows that suffering has been essential to his development and has helped him to learn certain lessons. When others fall into the same experience, therefore, he does not wish that they should not have it so much as that they should learn the lesson of it. It would be illogical to apply his wisdom in his own case but to withhold it in the case of others. If a sentimentalist says that because he feels sympathy for others, he wishes them not to suffer, then that is all the more reason--not less--for wishing them not to suffer blindly.
-- Notebooks Category 13: Human Experience > Chapter 1: Situation > # 400