Time is a great teacher, but unfortunately it kills all its pupils.

Give me a dozen healthy infants, well-formed, and my own specified world to bring them up in and I'll guarantee to take any one at random and train him to become any type of specialist I might select—doctor, lawyer, artist, merchant-chief and, yes, even beggar-man and thief, regardless of his talents, penchants, tendencies, abilities, vocations, and race of his ancestors.

"In every character I create, there is a part of me and a part of the world I observe."

宇宙将目光投向一个二维生物，它一生都在为后来成为地球的东西服务，它可以旅行数百万年，并且总是会回到它的起点，它永远不会意识到它上面或下面的是什么。

每一本书都是一次旅程，每一次旅程都是一本书。