"When you rely on the guru, your virtue increases and your non-virtue decreases. Understanding this, develop the idea that your abbot is the Teacher whether he or she is greatly or slightly learned, is knowledgeable or not, or has kept ethical discipline or faulty discipline. Just as you have a liking for and faith in the Teacher, so too you should have a liking for and faith in the abbot. Develop reverence for your masters and serve them. Think that you will complete the collections that lead to enlightenment and eliminate the afflictions that you still have in dependence on this. Then you will obtain pleasure and joy. With respect to virtue act in accord with the gurus' words, but do not act in accord with the gurus' words with respect to nonvirtue."

Ratna-megha-sūtra