过去是一个参考的地方，而不是居住的地方。
所以，即使做很困难的事情，也一定能够达到目的，没听说过想达到自己的愿望，而能回避困难的。
The most successful businesses are those that focus on creating value for their customers.
Mental activity is the organism's dialogue with its environment.
A person may cause evil to others not only by his actions but by his inaction， and in either case， he is justly accountable to them for the injury.
