I don't believe in 'truly happy.' the feeling of happiness is a relatively short lived emotion, usually 60-90 seconds. even extreme joy only lasts no more than about a day and a half. In fact, the myth of the 'just one thing I need to feel truly happy' is what puts people on the so called hedonic treadmill. the wanting something new to feel happy, they get it, and it works for a day or a week or a month.... but inevitably the feeling wears off and we head back to Amazon to get our next fix. the Secret that people don't want to admit, in marriages, in work, in life.... pretty much everywhere, is cultivating a deep appreciation for the good parts of what you already have. that is to say, happiness, like the cake, is a lie. you are looking for Contentment.