There is no denying that, most optimists have a high happiness index, which can hardly be experienced by pessimists. Therefore, we must read our life with a positive attitude. What’s more, the optimistic attitude can infect others strongly, meaning that we will find that all the friends around us are optimistic if we observe them in the same perspective. As a result, an atmosphere of optimism and happiness could be naturally set up. Therefore, let’s keep the famous line of Shelley, the well-known poet, in mind for ever, that is, “If winter comes, can spring be far behind?”