一个好的化学家是“懒惰”的化学家——总是在寻找最简单的方法来完成任务。
"There is no substitute for books in the life of a child."
历史学家的首要职责是如实讲述他所见的真相，无论这会取悦还是触怒何人。
Quality is never an accident; it is always the result of intelligent effort.
The test of a first-rate intelligence is the ability to hold two opposed ideas in the mind at the same time, and still retain the ability to function.