It is no doubt true that we cannot go through life without sorrow. There can be no sunshine without shadow, we must not complain that roses have thorns but rather be grateful that thorns bear flowers. Our existence here is so complex that we must expect much sorrow and suffering. Yet it is certain that no man was ever discontented with the world who did his duty in it. The world is like a looking glass; if you smile, it smiles; if you frown, it frowns back. Always try, then, to look at the bright side of things. There are some persons whose very presence seems like a ray of sunshine and brightens the whole room. Life has been described as a comedy to those who think and a tragedy to those who feel. What is the author’s message in this passage ?