Story of time 

As the old saying goes, children are right and wrong, while adults only look at the pros and cons. With the growth of age, we should also be more and more experience, people this animal ah, there is no absolute good or bad points. Then you are good when you benefit me. When you harm my interests, then you become bad. If you want to be accepted by adults beaten by the society, you should just stand on the moral high ground and blindly reason to him, which is certainly useless. It must show the most true side of human nature.