Everyone strives to achieve a life full of happiness. However, it is hard to define what happiness is, just as the old saying goes—different strokes for different folks. But I believe there are a few key factors which are common to make people feel happy. There are many reasons for difficulties in the definition of happiness. On the one hand, gender and ethnic group differentials are more pronounced. It is not surprising that some movie scenes can touch most girls’ hearts while boys have no sense of that. At the same time, local romantic stories are easier to understand by the natives. On the other hand, with times changing, for most people who lived in the past, enough food may satisfy them fully, but in modern society, happiness varies according to the different social status. The happiness of the rich may come from gaining a higher reputation while the poor may feel content with streaming videos on the phone in a relaxed mood. Though the definition of happiness changes through different times and different individuals, some key factors are still common, such as an environment with love and care, friends who can talk to when running into troubles, and a society with fairness and righteousness. For example, you may lack food and suffer from hunger, but with someone who cares for you and listens to you, you may feel more satisfied than being isolated but with a stomach filled with rich food. Better is a dinner of herbs where love is, than a fatted calf with hatred. In conclusion, happiness derives from the positive understanding of inner parts. Different individuals have different insights. Though it is not easy to interpret it, it is still possible for us to bring others happiness by loving each other. AI gave me a scores of 7.5. Where could it be repolished and improved?🤔🤔