The method of psychology must be objective, even when studying subjective phenomena.

Boundaries define us. They define what is me and what is not me. A boundary shows me where I end and someone else begins, leading me to a sense of ownership.

I don’t write for the reader; I write for myself.

Never ask a barber if you need a haircut.

Never stop learning; the world is always changing.

The poor are not irrational; they are just as rational as anyone else, but they operate under very different constraints.

你的时间有限，不要浪费在过别人的生活上。