The Taoism (chin: 道教 from 道, dao, literally the way) is originally a Chinese philosophy, but has now developed later to a national religion.
The 'dao', as the central element of this doctrine is best understood as a comprehensive world-principle to understand is that the people are not purely rational accessible. Man should interfere as little as possible this principle through conscious action and pursuit, but live in mystical, intuitive way in accordance with this Act.