"History by apprising them [the people] of the past will enable them to judge of the future. . . . It will qualify them as judges of the actions and designs of men: it will enable them to know ambition under every disguise it may assume; and knowing it, to defeat its views."

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There is nothing else that so kills the ambitions of a person as criticisms from superiors. I never criticize anyone. I believe in giving a person incentive to work. So I am anxious to praise but loath to find fault. . . . I have yet to find a person, however great or exalted his station, who did not do better work and put forth greater effort under a spirit of approval than he would ever do under a spirit of criticism.

— Charles R. Schwab