Write a Précis of the following passage and suggest a title:
It is no doubt true that we cannot go through life without sorrow. There can be no sunshine without shade. 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 much suffering. Many people distress and torment themselves about the mystery of existence. But although a good man may at times be angry with the world, it is certain that no man was ever discontented with the world who did his duty in it. The world is a looking-glass, if you smile, it smiles, if you frown, it frowns back. If you look at it through a red glass, all seems red and rosy: if through a blue, all blue, if through a smoked one, all dull and dingy. Always try then to look at the bright side of things, almost everything in the world has a bright side. There are some persons whose smile, the sound of whose voice, whose very presence seems like a ray of sunshine and brightens a whole room. Greet everybody with a bright smile, kind words and a pleasant welcome. It is not enough to love those who are near and dear to us. We must show that we do so. While, however, we should be grateful, and enjoy to the full the innumerable blessings of life, we cannot expect to have no sorrows or anxieties. Life has been described as a comedy to those who think, and a tragedy to those feel. It is indeed a tragedy at times and a comedy very often, but as a rule, it is what we choose to make it. No evil, said Socrates, can happen to a good man, either in Life or Death.

Precis:
Joy and sorrow go hand in hand in life. Difficulties are the cornerstone of life because they provide men with a different perspective on life. One can only appreciate the blessings of life after facing the adversities of life. The world reflects what one wants to see. An optimistic person will observe a world full of happiness, whereas a pessimistic person will only see the miseries and pain in the world. Both are realities of life, and one cannot prevent himself from suffering. Men, however, should try to remain happy and transfer their positive energy to the rest of the world.

Title: Life: A reflection of one's perspective