The history of mathematics is a history of human thought and progress.

"Acting is not about being someone different. It's finding the similarity in what is apparently different, then finding myself in there."

我不与任何人竞争，我只与自己竞争。

人は、自分が思っている以上に、他人を必要としている。

A person may cause evil to others not only by his actions but by his inaction， and in either case， he is justly accountable to them for the injury.

It is not enough to observe and experiment, theorize and calculate. One must also imagine.

The less you need, the freer you become.