Success is not final, failure is not fatal: it is the courage to continue that counts.
The soul is healed by being with children.
生产的最终条件是生产条件的再生产。
在数学中，提出问题的艺术必须比解决问题更有价值。
The talent for being happy is appreciating and liking what you have, instead of what you don't have.
欣赏和喜欢你拥有的东西，而不是你没有的东西，你才能快乐。