坚持是数学研究的关键,许多伟大的成果来自于长期的奋斗。
We are so accustomed to disguise ourselves to others that in the end we become disguised to ourselves.
Happiness is a good flow of life; the conviction that you are taking part in the universe's purpose.
Inequality is not inevitable. It is a result of policy choices.
The world is not a problem to be solved; it is a living being to which we belong.