The world is full of people who have never, since childhood, met an open doorway with an open mind.

The young do not know enough to be prudent, and therefore they attempt the impossible – and achieve it, generation after generation.

【释义】想要成就一番事业，必须先建立坚定的自信；想要胜过他人，必须先克服自身的缺点与不足。