所有企业需要永葆青春。如果客户群与你一起变老，你就会重蹈伍尔沃斯的覆辙。
科学严谨性绝不能因商业压力而妥协。
Sometimes the most ordinary things can be made extraordinary.
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.