"All is more or less proper to serve as a common measure, in proportion as it is more or less in general use, of a more similar quality, and more easy to be divided into aliquot parts. All is more or less applicable for the purpose of a general pledge of exchange, in proportion as it is less susceptible of decay or alteration in quantity or quality."

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Criticism is above all a gift, an intuition, a matter of tact and flair; it cannot be taught or demonstrated--it is an art. Critical genius means an aptitude for discerning truth under appearances or in disguises which conceal it; for discovering it in spite of the errors of testimony, the frauds of tradition, the dust of time, the loss or alteration of texts. It is the sagacity of the hunter whom nothing deceives for long, and whom no ruse can throw off the trail.

— Henri Frederic Amiel