每个词都是通向自由的一步。

The notion of truth is not definable in any formal system that is strong enough to include arithmetic.

恐惧是心灵的监狱。

实现明天的唯一限制是我们今天的疑虑。

The novel is the art of making the private public, the personal universal.

The artist must be a pilgrim of the unknown.

数学的力量来自于它的抽象和概括能力，将具体问题转化为普遍真理。