Scott Kaufmann in a letter to the editor of the Wall Street Journal offers this Zen quote as the answer to the pursuit of Happiness.
"The Master in the art of living makes little distinction between his work and his play, his labor and his leisure, his mind and his body, his education and his recreation, his love and his religion. He simply pursues his vision of excellence in everything he does, leaving others to determine whether he is at work or at play. To him, he is always doing both."