Writing down one thing you are grateful for each day is the cheapest possible therapy ever.
思考是最艰难的工作,这可能是为什么如此少的人从事它。
The best way to predict the future is to create it.
Make up your mind to act decidedly and take the consequences. No good is ever done in this world by hesitation.  
The past is always changing. It is not fixed. The past is not stable.