幸福晚年的秘诀在于要有好的记性和坏的记性。

There is no such thing as a special category of science called applied science; there is science and its applications, which are related to one another as the fruit is related to the tree that has borne it.

适合一个人的鞋子会夹痛另一个人的脚，不存在适合一切人的生活方式。