Productivity is being able to do things that you were never able to do before.
Mathematics is not about numbers, equations, computations, or algorithms: it is about understanding.
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。