A tranquil mind is the source of health.
教人学习却坚持有天命的观点,这就好像叫人包起头发来却有去掉了他的帽子。 
I can't understand why people are frightened of new ideas. I'm frightened of the old ones.
The study of the mind must be based on direct observation.
No matter how good you get you can always get better, and that's the exciting part.