世界上发生的任何事情，其意义无非是某些极大或极小值。

The past, like the future, is indefinite and exists only as a spectrum of possibilities.

We are moving from an economy based on the production of goods to one based on the production of knowledge.

Be a yardstick of quality. Some people aren’t used to an environment where excellence is expected.

有两样东西，人们越是经常持久地对之凝神思索，它们就越是使内心充满常新而日增的惊奇和敬畏：我头上的星空和我心中的道德律。