The psychologist must be an impartial observer.
心理学家必须是一个公正的观察者。
We don't stop playing because we grow old; we grow old because we stop playing.
The best way to learn is by doing, not just by listening or reading.
成为人就是永远不完整，永远在寻找。
经济周期不仅仅是围绕某个平滑趋势的波动，而是经济受到根本性冲击的结果。