勇敢者的心永远不会被奴役。

卡塞尔文献展是对人类精神的庆祝。

数学不仅仅是关于数字、方程、计算或算法，而是关于理解。

Life is too short to stay in your comfort zone.

The spread of liberal democracy around the world is not inevitable, but it is the most likely outcome given the alternatives.

The purpose of abstraction is not to be vague, but to create a new semantic level in which one can be absolutely precise.

每次失败都会受伤。但你必须重新站起来继续前进。