没有什么比独立和自由更宝贵。
生活只是由一系列下决心的努力所构成。
可持续性不是一种风格，而是一种责任。
Reinforcement is the central factor in the acquisition of new behavior patterns.
The state of your life is nothing more than a reflection of your state of mind.
Growth is painful but necessary.
The best way to predict the future is to create it.
