摩訶止觀 5.203

5.203

○次、明破法遍者，為三：一、無生門，從始至終盡其源底，竪破法遍；二、歷諸法門，當門從始至終盡其源底，橫破法遍；三、橫竪不二，從始至終盡其源底，非橫非竪破法遍。竪則論高；橫則論廣。竪來入橫，無橫而不高；橫來入竪，無竪而不廣。《法華》云：「其車高廣。」橫竪不二，則非橫非竪，故云：「是法平等，無有高下。」

Next, clarifying the universal refutation of dharmas has three parts: first, through the gate of nonproduction, exhausting its source and bottom from beginning to end, the vertical universal refutation of dharmas; second, traversing the various dharma-gates, exhausting their source and bottom from beginning to end within each gate, the horizontal universal refutation of dharmas; third, the nonduality of the horizontal and vertical, exhausting their source and bottom from beginning to end, the neither-horizontal-nor-vertical universal refutation of dharmas. Vertically, we speak of height; horizontally, we speak of breadth. When the vertical enters the horizontal, there is no breadth that is not high; when the horizontal enters the vertical, there is no height that is not broad. The Lotus Sūtra says: 'Its carriage is high and broad.' If the horizontal and vertical are nondual, then it is neither horizontal nor vertical; hence it says: 'This Dharma is equal, without high or low.'