Years have seasons, spring, summer, autumn and winter; days have seasons, alternating black and white; life also has seasons, that is birth, old age, sickness and death. George and Herbert said, "If a man is not handsome at 20, strong at 30, rich at 40, and wise at 50, then he will never be handsome, strong, rich, and wise for the rest of his life." It is the season of life in the eyes of Westerners. Mr. Kong Lao said: "At fifteen I set my mind on learning, at thirty I stood firm, at forty I ...