只为自己活着的人，不值得活在世上。
The great ideological battles between liberalism and communism, or between democracy and authoritarianism, have been replaced by a general consensus on the desirability of liberal democracy.
我们就是我们一再重复的行为。因此，卓越不是一种行为，而是一种习惯。
复杂性不是理解的障碍，而是需要克服的挑战。
The historian’s task is to bring the dead to life.