投资者应专注于他们能控制的事情：成本、分散投资和时间范围。
Investors should focus on what they can control: costs, diversification, and time horizon.
On progress: "If you're competitor-focused， you have to wait until there is a competitor doing something. Being customer-focused allows you to be more pioneering."
The greatest patriotism is to tell your country when it is behaving dishonorably, foolishly, viciously.