"The most important thing is to stay courageous."
I have called this principle, by which each slight variation, if useful, is preserved, by the term Natural Selection.  
The best way to improve a program is to rewrite it.
It is not the place that makes the person, but the person who makes the place.
Invest in research today, or face scarcity tomorrow.
仅靠政策无法拯救我们的森林——需要个人、企业和政府采取行动。
如果你不愿意冒险,就永远不会取得伟大的成就。