It is not necessary to bathe in rivers and seas, it is necessary to remove dirt; horses do not need to ride, it is necessary to walk well; it means that one's desires should be combined with reality, not excessive, act according to one's ability, and stop in moderation. If you compare people with others, you will die, if you compare goods with others, you will be thrown away. Everyone is less than the superior and more than the inferior. Don't be like a snake swallowing an elephant if you are incompetent. Eat pig liver and think of pig heart. Eat silver and think of gold. The toad wanted to eat the swan meat, but in the end, it was all in vain