The quality of an organization's learning determines the quality of its improvement.
2000年：贝索斯致股东信《即使在最残酷的时期，也将努力把公司打造更具“重量”》
The best way to measure your investing success is not by whether you're beating the market but by whether you've put in place a financial plan and a behavioral discipline that are likely to get you where you want to go.