在数学中，提出问题的艺术必须比解决问题更有价值。
In mathematics, the art of proposing a question must be held of higher value than solving it.
Failure is just a stepping stone to success.
The metropolis exacts from man as a discriminating creature a different amount of consciousness than does rural life.
O homem só é verdadeiramente livre quando reconhece a sua dependência dos outros.
书籍是最终的被抛弃者：放下它们，它们会永远等你；关注它们，它们总是会回报你的爱。
我不是为了钱做音乐，我是从音乐中赚钱。
成功的关键是在事情看起来不可能的时候继续前进。