We perceive the world in terms of its significance for action.
The only way to discover the limits of the possible is to go beyond them into the impossible.
聪明的人谈现在,愚蠢的人谈过去,傻子才谈未来。
The world is my country, all mankind are my brethren, and to do good is my religion.
Core technologies cannot be bought; they must be developed independently.