德国著名哲学家叔本华说:“社交生活的坏处深藏不露:消遣、闲聊和其他与人交往的乐趣掩藏着巨大的、通常是难以弥补的祸害。青年人首先要学习的一课,就是承受孤独。因为孤独是幸福、安乐的源泉。”(名言引入,亮出中心论点)世间怕有无数声称自己幸福的人,却没有多少人认为自己是一个孤独的人。“幸福”的人往往开朗、健 Schopenhauer, a famous German philosopher, said: “The bad aspects of social life are hidden: leisure, gossiping, and other human interactions hide a huge, often irreparable scourge. The first lesson young people should learn It is to endure loneliness, because loneliness is the source of happiness and well-being.” (The introduction of famous quotes, revealing central arguments) There are many people who claim to be happy in the world, but few people think of themselves as a lonely person. “Happiness” people are often cheerful and healthy