燕子飞来时正值春社，梨花凋落后便是清明时节。

A thermonuclear war cannot be considered a continuation of politics by other means (according to the formula of Clausewitz). It would be a means of universal suicide.

挑战让我更强大。

Perhaps as important is the relation between the existence of solutions to a competitive equilibrium and the problems of normative or welfare economics.

我不可能让所有人都喜欢我，因为我不是神。

The true test of leadership is not what you do when you're being watched, but what you do when you're alone.

Success is not final, failure is not fatal: It is the courage to continue that counts.