"Secondly, figures, the symbols of numerical magnitude, are frequently also the symbols of operations, as when they are the indices of powers. Wherever terms have a shifting meaning, independent sets of considerations are liable to become complicated together, and reasoning and results are frequently falsified."

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An adult is one who has lost the grace, the freshness, the innocence of the child, who is no longer capable of feeling pure joy, who makes everything complicated, who spreads suffering everywhere, who is afraid of being happy, and who, because it is easier to bear, has gone back to sleep. The wise man is a happy child.

— Arnaud Desjardins