每一种语言都是思想的古老森林。
Every language is an old-growth forest of the mind.
The challenge in computer science is not just to solve problems, but to solve them in a way that is both efficient and elegant.
A problem well put is half solved.
意识是一个过程，而非物质。
The challenge of art is to make the invisible visible.
No man, for any considerable period, can wear one face to himself and another to the multitude, without finally getting bewildered as to which may be the true.