梵網經菩薩戒本疏 5.94

5.94

初、制意者，新學求法理宜為說，如乖此躅為失至重，故須制也。略由三意：一、為護前慳法重罪，二、為欲攝護新學法器令正行有依，三、為護正法傳燈不絕，故須制也。

First, the intent of institution: When new students seek the Dharma, by principle one ought to explain it for them; if one deviates from this track, the fault is extremely grave, hence it must be instituted. It is briefly due to three intents: 1. to guard against the aforementioned major offense of begrudging the Dharma; 2. to gather and protect new students who are vessels for the Dharma so that correct practice has a basis; 3. to protect the true Dharma so that the transmission of the lamp is not cut off; therefore it must be instituted.