所有伟大的艺术和文学都是宣传。
All great art and literature is propaganda.
理论物理学之于数学，犹如雕塑之于大理石块。
To be happy is to be able to become aware of oneself without fright.
The greatest wisdom is to realize one's own ignorance.
Success is a journey, not a destination. The doing is often more important than the outcome.
未来是用来发现的。