四分律行事鈔資持記 2.1522

2.1522

三教人中，標。云皆通者，由是教人，塞義不立。教他為所通，自作為能通，所通通多少，能通唯一行。

In the third section, on instructing others, the heading states: 'all are non-obstructed' because, when instructing others, the meaning of obstruction is not established. Instructing others is that which is penetrated; one's own action is that which penetrates. That which is penetrated may be many or few, while that which penetrates is only a single practice.