A person must learn causal education before entering the society, because no matter what job he is engaged in, he will always experience the process and the result. The process may be very complicated, but he must find a way to pass, and of course he must choose the best way and ask for a very satisfactory result. In this process, you should learn to repay kindness. Otherwise, the end will be miserable, which is also a kind of retribution! So we should learn causal education.