"Of Rhetoric various definitions have been given by different writers; who, however, seem not so much to have disagreed in their conceptions of the nature of the same thing, as to have had different things in view while they employed the same term."

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It is useful to remember that history is to the nation as memory is to the individual. As a  person deprived of memory becomes disorientated and lost, not knowing where they have been or where they are going , so a nation denied a conception of the past will be disabled in dealing with its present and its future.

— Arthur M. Schlesinger, Jr.