What is Happiness? The Psychology, Physiology, and Power of Thinking. Happiness is what every human being searches for. We chase it through money, relationships, success, and fame. But what exactly is happiness? Is it just a feeling, or is it a choice we make every day? Modern science says that happiness is not just an emotion; it is a complex biological and psychological state that we can actually train ourselves to achieve. In this article, we will dive deep into what happiness really means, how our brain and body create it, and how our th…