The only limits you have are the ones you place on yourself.

Reality is always the starting point.

One must not lose desires. They are mighty stimulants to creativeness, to love, and to long life.

The great growling engine of change—technology.

纯数学和应用数学之间的相互作用是真正创新发生的地方。

写作是记住，但记住也是遗忘。

Every song has its own life.

清晰和秩序是优秀写作的基础。

Psychology should be the science of mental life, both of its phenomena and of their conditions.