To do mathematics is to explore a universe of ideas, where the only limit is your imagination.

你给予的越多，得到的也越多。

Happiness ain't a thing in itself --- it's only a contrast with something that ain't pleasant. That's all it is.

"The only true wisdom is in knowing you know nothing."

The most dangerous phrase in business is 'We've always done it this way.'

The task of art today is to bring chaos into order.