"The best and most beautiful things in the world cannot be seen or even touched - they must be felt with the heart."
世界上最好和最美丽的东西是看不见甚至摸不到的——它们必须用心去感受。
The time factor is more important than price.
I have already carried out my duty. I have proved the Poincaré conjecture and I have nothing more to do in mathematics.
科学的美丽在于它能够将抽象转化为具体。
传记作者的任务是复活过去,而非评判它。