In teaching history， there should be extensive discussion of personalities who benefited mankind through independence of character and judgement.

你必须愿意为了你将成为的人而牺牲你现在是谁。

The most profound ideas in mathematics often arise from the simplest observations.

The best things in life are unexpected.

不过话得说回来，没有一桩事是容易的。

国际体系的无政府性质迫使各国将自身生存置于一切之上。