Discussing happiness, which has been at the forefront of human endeavour since time immemorial, is often deemed laughable and absurd or, at least, non-important. However, since it actually determines the quality of every single moment of our lives, it might be worthy of investigation. Here I present the view of happiness not as a certain feeling to be attained and maintained but as a skill that can be precisely defined and practiced. Specifically, I attempt to show the ways in which our existing notions about happiness are misguided and provide an answer as to what happiness really is and how it can be achieved. Through this investigation, we discover that happiness does not depend on particular circumstances, whether inner or outer, but on the quality of our relationship to circumstances in general. We also discover that the reason we have an unhealthy relationship to circumstances is ignorance of our mind’s true nature and potential, which generates a plethora of attachments and aversions which lead us to endless suffering. In order to end this ignorance, an expanded type of education and investigation are needed, specifically, the type which take into account the inner, mental dimension of life. It is, then, only through dedicated mind training that happiness can be attained. One example of such mind training is given in the form of Buddhist philosophy and spiritual practice, according to which happiness is only achievable through the diligent application of wisdom and compassion in our concrete, everyday life.