Productivity is being able to do things that you were never able to do before.

数学不是关于数字、方程、计算或算法：它是关于理解的。

Afghanistan is the land of my past, the place where I had laughed and cried, but it was no longer my home.

The most important quality in a scientist is persistence.

当你开始思考风格的那一刻，你就迷失了。

感谢那些曾经看轻我的人，让我不低头更精彩的活。