"When ‘this’ and ‘that’ do not stand against each other, this is called the pivot of the Tao. This pivot provides the centre of the circle, which is without end, for it can react equally to that which is and to that which is not. This is why it is best to shed light on such issues. To use a finger to show that a finger is not a finger, is not really as good as using something that is not a finger to show that a finger is not a finger; to use a horse to show a horse is not a horse is not as good as using something other than a horse to show that a horse is not a horse. Heaven and Earth are as one as a finger is, and all of creation is as one as a horse is."