"Everything is a learning process: any time you fall down, it's just teaching you to stand up the next time."
一切都是一个学习的过程：每次你跌倒，它只是在教你下次站起来。
Words are the bridge between the inner and outer world.
Nothing can stop the man with the right mental attitude from achieving his goal; nothing on earth can help the man with the wrong mental attitude.
The laws of organization govern all mental processes.
In science, the only constant is change.
The meaning of earthly existence lies not, as we have grown used to thinking, in prospering but in the development of the soul.