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 MaharshiKnow that the eradication of the identification with the body is charity, spiritual austerity and ritual sacrifice; it is virtue, divine union and devotion; it is heaven, wealth, peace and truth; it is grace; it is the state of divine silence; it is the deathless death; it is jnana, renunciation, final liberation and bliss.
Ramana MaharshiThe mind is only a bundle of thoughts. The thoughts have their root in the I-thought. Whoever investigates the True "I" enjoys the stillness of bliss.
Ramana Maharshi