创作的行为是一种信仰的行为。
没有坚强意志品质的人学识智慧也不会通达;不遵守诺言的人行动也不会实现。
The competitor to be feared is one who never bothers about you at all, but goes on making his own business better all the time.
在数学中,提出问题的艺术必须比解决问题更有价值。