It is better to solve one problem five different ways, than to solve five problems one way.
George PolyaWhat is the difference between method and device? A method is a device which you use twice.
George PolyaPedantry and mastery are opposite attitudes toward rules. To apply a rule to the letter, rigidly, unquestioningly, in cases where it fits and in cases where it does not fit, is pedantry. [...] To apply a rule with natural ease, with judgment, noticing the cases where it fits, and without ever letting the words of the rule obscure the purpose of the action or the opportunities of the situation, is mastery.
George Polya