It surprises me that most people may not even know that they are not that happy. Most of the time people believe they are happy or are not depressed because they may not know the true definition of happiness. Also people are delusional about their emotions because they don't know the signs of depression. What contributes to our own happiness has to do with living out our passions, eating well, exercising and being true to oneself. Depression is being unhappy and unhappiness stems from not living out ones own desires.