Psychology must be based on observable facts, not speculation.
心理学必须基于可观察的事实，而非推测。
释义：勇敢的人敢闯天下，什么事情都能做成；过于谨慎的人却处处束手束脚，一步也难以前行。
Every barrel of oil we produce must be the most responsibly produced barrel possible.
如果你一直重读上一章，就无法开始人生的新篇章。
The test of our progress is not whether we add more to the abundance of those who have much; it is whether we provide enough for those who have too little.
自信不是天生的，是慢慢培养出来的。
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.