购买工具。从购买你能找到的最便宜的工具开始。升级你经常使用的工具。如果你在某项工作中最终选择使用了某种工具，就买你能负担得起的最好的。
Buying tools: Start by buying the absolute cheapest tools you can find. Upgrade the ones you use a lot. If you wind up using some tool for a job， buy the very best you can afford.
The greatest blessing of our democracy is freedom. But in the last analysis, our only freedom is the freedom to discipline ourselves.
煤炭推动了我们的过去，但我们必须诚实地面对它在未来中的作用。
可持续发展不再是选择，而是生存的必需。
The role of a leader is to create more leaders, not followers.
True success is inner peace.
生命中最伟大的荣耀不在于从不跌倒，而在于每次跌倒后都能站起来。