Human beings are born to suffer, and pain is the means of human self-preservation.Childhood has only physical pain, so it is happy.These physical pains are less cruel, less tragic, and less self-destructive than other forms of pain.The pain of gout does not make people commit suicide, what makes people desperate is mental pain.We sympathize with the pain of our children, but it is us who should be sympathetic, and our greatest sorrow is caused by ourselves.