« Vigorous mental work may be an excercise as desirable as a fast game of tennis. Having tested the pleasure in mathematics [the student] will not forget it easily. »
« The best that the teacher can do for the student is to procure for him, by unobtrusive help, a bright idea. »
« A good teacher should understand and impress on his students the view that no problem whatever is completely exhausted. There remains always something to do; with sufficient study and penetration, we could improve any solution, and, in any case, we can always improve our understanding of the solution. »
~ “How to solve it”. G. Polya.