法華玄論 6.157

6.157

答：體雖是一，隨義說四也。縱任自在歡喜快樂故名為車，所說教門隨佛運用如使，能示語眾生如人也。大乘正法無患不障，如舍虛通無礙為一，眾德可珍遠涉乃得如寶所也。小乘四義可以意求也。

Answer: Although its essence is one, it is expounded as four in accordance with different meanings. Because it is unconstrained, autonomous, and brings joyful delight, it is called a carriage; the gates of teaching expounded are employed in accordance with the Buddha just like messengers; being able to instruct sentient beings, they are like persons. The correct Dharma of the Great Vehicle leaves no affliction unshielded, like a mansion; empty, pervasive, and unobstructed, it is one; its numerous virtues are precious, to be attained only after traveling afar, like a treasure trove. The four meanings of the Lesser Vehicle can be understood accordingly.