Happiness is knowing and making sense of this world. Maturity and Clearer view of what is it of life that is worth living for.
Happiness is knowing the fact that you are making a difference in this world.
Happiness is seeing humans reaching a moral and philosophical perfection.
Happiness is sanity, enjoyed by those who are too simple minded to look deeper into the imperfections of this world.
Happiness is relief you get when you reach into your pocket and find condom at the crucial moment when you brought home an new chick.