The key to success lies in persistence and hard work.

"The world is full of obvious things which nobody by any chance ever observes."

He who is not a good servant will not be a good master.

忧虑是一种积极的心理活动，可以开阔人的思路。如果能正确引导这一情绪，你就可以洞察任何形势下的负面风险，并采取行动规避这些风险。

The idea of legal responsibility is central to the concept of law.