当你怀疑自己是否能飞的那一刻，你就永远失去了飞翔的能力。
The moment you doubt whether you can fly, you cease for ever to be able to do it.
文化生态学与人类生态学的不同之处在于它强调文化被修改的适应过程。
Quality is free. It's not a gift, but it's free. What costs money are the unquality things -- all the actions that involve not doing jobs right the first time.
学习某事的最好方法就是去教它。