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There are periods when to dare, is the highest wisdom

All noble enthusiasms pass through a feverish stage, and grow wiser and more serene

Men are never very wise and select in the exercise of a new power

A single hour a day, steadily given to the study of some interesting subject, brings unexpected accumulations of knowledge

The wise only possess ideas, the great part of mankind are possessed by them

The chief object of education is not to learn things but to unlearn things