Not only do we live in the world of thought， but also in the world of matter.

A good business is built on trust, not just profit.

【译文】冰与炭不能长久共存，寒与暑不会同时到来。

Challenges are opportunities in disguise; embrace them.

The best ideas often come from the most unexpected places.

Combinatorics is the art of counting without counting.

译文：再好的医生救不了注定要死的人，再凶的人也斗不过老天爷。