The Internet is a powerful tool for education, but it is not a substitute for the teacher.
Eager and intense desire is the mainspring of all effective effort.  
认为世界上只有一种真理,而自己正掌握着它,在我看来这是世界上所有邪恶最深的根源。
The good times of today, are the sad thoughts of tomorrow.
A building should respond to its context, not ignore it.