Success in solving the problem depends on choosing the right aspect, on attacking the fortress from its accessible side.
George PolyaWhat is the difference between method and device? A method is a device which you use twice.
George PolyaIf you wish to learn swimming you have to go into the water and if you wish to become a problem solver you have to solve problems.
George PolyaTo teach effectively a teacher must develop a feeling for his subject; he cannot make his students sense its vitality if he does not sense it himself. He cannot share his enthusiasm when he has no enthusiasm to share. How he makes his point may be as important as the point he makes; he must personally feel it to be important.
George Polya