維摩經玄疏 5.91

5.91

答曰：譬如未得神通之人，若在牢獄，必須穿牆破壁，方得走脫。若是得神通之人，處在牢獄，雖不穿牆破壁，而出入無礙也。

Answer: It is like a person who has not yet attained supernatural powers: if imprisoned in a dungeon, he must break through the walls before he can escape. If it is a person who has attained supernatural powers, when placed in a dungeon, although he does not break through the walls, he goes in and out without obstruction.