水从山上流到滩头不是有意的，白云从洞中穿过也是无心的。

The true spirit of delight, the exaltation, the sense of being more than Man, which is the touchstone of the highest excellence, is to be found in mathematics as surely as in poetry.

The right of a nation to kill a tyrant in case of necessity can never be doubted until the right of a tyrant to kill a nation has been proved.

The best performances come from a place of vulnerability.

I can resist everything except temptation.

关于煤炭的讨论必须超越"支持"或"反对"—我们需要解决方案，而不是口号。