You can always juice sales by going down-market, but it's hard to go back upmarket.
The elephant is where the action is. The rider is there to serve the elephant.
The existence of law is one thing; its merit or demerit is another.
You don't have to be a genius or a visionary to succeed. You just need to be persistent.
程序测试可以用来显示错误的存在，但绝不能显示它们的不存在！
You are worth more than you think.