"He who attempts to make others believe in means which he himself despises is a puffer; he who makes use of more means than he knows to be necessary is a quack; and he who ascribes to those means a greater efficacy than his own experience warrants is an impostor."

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Nothing in the entire universe ever perishes, believe me, but things vary, and adopt a new form. The phrase being born is used for beginning to be something different from what one was before, while dying means ceasing to be the same. Though this thing may pass into that, and that into this, yet the sums of things remains unchanged.

— Ovid