Happiness is your real nature. You identify with yourself with the body and mind, feel it's limitations, and suffer. Realize your true self in order to open the store of happiness. That true self is the reality, the Supreme Truth, which is the self of all the world you now see, the self of all the selves, the One real, the Supreme, the Eternal self - as distinct from the ego or the bodily idea for the self.
Ramana MaharshiTurn the mind inward and cease thinking of yourself as the body; thereby you will come to know that the self is ever happy. Neither grief nor misery is experienced in this state.
Ramana MaharshiThe mind of one meditating on a single object becomes one-pointed. And one-pointedness of mind leads to abidance in the self. Real attainment is to be fully conscious, to be aware of surroundings and the people around, to move among them all, but not to merge consciousness in the environment. One should remain in inner independent awareness.
Ramana Maharshi