Success is not the key to happiness. Happiness is the key to success. If you love what you are doing, you will be successful.
The purpose of psychology is to understand how we cope with the world.
《与邹鲁的谈话》（1919年6月）
创新不仅仅是技术的问题；它是关于改变思维方式，为后代创造可持续的解决方案。