As is apparently revealed in the cartoon above, the sheep lives happily in an optimistic state of mind, ignoring the threat of a dark shade, because he believes that where there is shadow, there is sunshine①. What is conveyed in the picture is both positive and illuminating。

　　As far as the purpose of the drawer is concerned, I think he intends to remind us of the importance of optimism. If the sheep in the cartoon feels anxious and pessimistic about the dark shade all day long, he can by no means have a comfortable and happy life. Examples like this are numerous, but I think the following one will be convincing enough. If there is half a cup of water, the pessimist may cry over it because they have only a half, while② the optimist may cheer for it because they still have a half. Obviously, they will have different perceptions and feelings③ toward the same life。

　　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?”

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（实习编辑：高奕飞）