心灵进化以满足实际需求。
"The mind evolves to meet practical demands."
The right of nature... is the liberty each man hath, to use his own power, as he will himself, for the preservation of his own nature; that is to say, of his own life.
写作是留下思想的遗产。
过去是一个陌生的国家；他们在那里做事的方式不同。