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

Trust your team, but always verify the details.

Stay hungry, stay foolish.

The greatest gift you can give someone is your time.

Without a strong team, even the best idea will fail.

教师必须具有健康的体魄，农人的身手，科学的头脑，艺术的兴味，改革社会的精神。