Psychology must be a science of observation, not speculation.
Success is not the key to happiness. Happiness is the key to success. If you love what you are doing, you will be successful.
译文：专门注重修养内心的人每天都会看到自己的不足，专门注重增长见识的人每天都会看到自己的长处。每天看到自己不足的人会逐渐变得有长处，每天看到自己有长处的人会逐渐变得有不足。
最伟大的发明是那些最直接满足人类需求的发明。
The best time to start investing in your relationships is in your 20s.
The dirty little secret is that you don’t have to be a nice person to be a great artist.
Life's too short to be anything but happy.