"The world is a game, and the game is a mirror."

The only freedom which deserves the name is that of pursuing our own good in our own way， so long as we do not attempt to deprive others of theirs， or impede their efforts to obtain it.

Entanglement is not just a curious feature of quantum mechanics - it is the essential feature.

学习不是试错的问题，而是洞察力的问题。

数学不仅仅是关于数字、方程、计算或算法：它是关于理解的。

The best way to create interest in a subject is to render it worth knowing, which means to make the knowledge usable.

世界不是游乐场，而是思想和利益的战场。