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 itself even serve to prepare the spirit of a diplomat, who must treat between state and state the complicated economic and political affairs of the modern world. And so, in conclusion, history and life interchange mutual services; life teaches history, and history, life; observing the present, we help ourselves to know the past, and from the study of the past we can return to our present the better tempered and prepared to observe and comprehend it. In present and in past, history can form a kind of wisdom set apart, in a certain sense aristocratic, above what the masses know, at least as to the universal laws that govern the life of nations.