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The highest endeavor of the mind, and the highest virtue, is to understand things by intuition.
The personal example of a teacher is the most useful sunshine that nothing can replace for the soul of young people.
It is one thing to show a man that he is in an error, and another to put him in possession of truth.
没有所谓的"应用科学"这一特殊类别;只有科学及其应用,它们之间的关系就像果实与结出果实的树之间的关系一样。