天台四教儀 1.74

1.74

一、觀不思議境，謂觀一念心，具足無減三千性相、百界千如，即此之境即空、即假、即中，更不前後，廣大圓滿，橫竪自在。故《法華經》云：「其車高廣」（上根正觀此境）。

First is contemplating the inconceivable realm: namely, contemplating that a single thought-moment of the mind is completely endowed with, without reduction, the three thousand natures and characteristics, the hundred realms and thousand suchnesses; this very realm is simultaneously empty, provisional, and middle, without before and after, vast and consummate, horizontally and vertically unhindered. Thus the Lotus Sutra says: "The carriage was tall and wide." (Those of superior faculties directly contemplate this realm.)