You can't just keep doing what works one time, everything around you is always changing. To succeed, stay out in front of change.

The real wealth of a nation lies in its natural capital.

自知之明的人，不埋怨人；了解命运的人，不埋怨天；埋怨别人的人，遭遇穷困；埋怨上天的人，没有志向。