In the Tibetan records of the Buddha, it is expressly mentioned that he sent out apostles "to spread the doctrine that would help all creation." Thus, even Gautama, the founder of monasteries, did not intend them to become places wholly given over to self-centered spiritual development alone. He knew that the truth is really for all, because it can benefit all; it is not merely for hermits and monks. Even where he turned numbers of men into monks, he did not wholly withdraw them from society but laid down a rule that they should serve the useful purpose of being spiritual teachers.
-- Notebooks Category 3: Relax and Retreat > Chapter 4: Retreat Centres > # 108