What is your favorite quotation and why? (300 words)

311-word version:
Pendant longtemps la personne qui dessine un rêve ressemble que le rêve finalement et lui disparaît. (One who keeps his dream for long time will finally resemble his dream.)

- Andre-Georges Malraux

...Although a dream may not show itself to the dreamer or bring any substantial achievements, if one continues to keep that dream, just as invisible odorant molecules float around, one may unconsciously smell like or resemble that dream...