A New York businessman saw a ragged pencil salesman, out of mercy, he gave the man a dollar, and soon he returned to take a few pencils from the seller, and sorry to explain that he forgot to take the pen. At the end, I said, "You and I are all businessmen. You have something to sell." After a few months, I met again. The seller has become a salesman and thanked the New York businessman. "You gave me self-esteem and told me. I am a businessman."
In other words, if you don't pay first, then there is no return. How do you treat others, others will treat you the same; or if you want others to treat you, you must treat others like this first. Therefore, if you want to be respected, you must first respect others. If you want to gain understanding, you must first understand others and pay for it.