Not what we have, but what we enjoy, constitutes our abundance.

Science is the crystallization of human wisdom and an important force driving social progress.

"A personality is a full Congress of orators and pressure-groups, of children, demagogues, communists, isolationists, war-mongers, mugwumps, grafters, prayer-meetings, spiritualists, and astrologers."

艺术家的角色是提问，而不是回答。

为儿童写作的秘诀是记住做孩子的感觉。