The proper study of psychology is not what the mind is, but what the mind does.
解释:砍伐树木不把树根砍掉,必能重新生长;堵塞水不把源头堵住,必会重新流出;消除祸患不铲除产生祸患的根基,祸患还会再生。
The only person who is educated is the one who has learned how to learn and change.