People should not only be able to act, be the protagonist of their own life, be happy when they should be happy, be sad when they should be; they should also be able to watch a play, be good at distinguishing various situations in the world, and not take everything too seriously.

Life is like a play, we stage joys and sorrows, we have tried to laugh, we have also tried to cry; life is like a play, we have experienced good times and bad... From "Encouraging Learning" by Xunzi