每一本书都是一次旅程，每一次旅程都是一本书。
Every book is a journey, and every journey is a book.
There’s a kind of beauty in the ordinary, if you take the time to see it.
我们必须平衡当今对可负担能源的需求与建设可持续能源未来的必要性。
Life in the state of nature is solitary， poor， nasty， brutish， and short.
The great struggle of the twentieth century was between liberalism and totalitarianism.
If you're changing the world, you're working on important things. You're excited to get up in the morning.