True happiness is chanting Nam-myoho-renge-kyo

And if we go by the words of the Lotus Sutra, you should also teach the sutra to the best of your ability. When the world makes you feel downcast, you should chant Nam-myoho-renge-kyo, remembering that, although the sufferings of this life are painful, those in the next life could be much worse. And when you are happy, you should remember that your happiness in this life is nothing but a dream within a dream, and that the only true happiness is that found in the pure land of Eagle Peak, and with that thought in mind, chant Nam-myoho-renge-kyo. 25/12

From the Writings of Nichiren Daishonin
The Fourteen Slanders