Tao is the source of both fullness and emptiness. But it is itself neither fullness nor emptiness.
ZhuangziNow, when ordinary people attempt to find happiness, I am not sure whether the happiness is really happiness or not. I study what ordinary people do to find happiness, what they struggle for, rushing about apparently unable to stop.
ZhuangziHence it demands the emptiness of all the faculties. And when the faculties are empty, then the whole being listens. There is then a direct grasp of what is right there before you that can never be heard with the ear or understood with the mind.
Zhuangzi