The fourfold sangha — monks, nuns, laymen, laywomen — was the Buddha's own formulation, and he refused to leave until all four were established. The word sangha is used two ways: narrowly for the ordained, and broadly for the whole community, and which meaning is intended is a live issue in Western convert Buddhism, where lay practitioners often do most of the teaching. The relationship is designed as mutual dependence: monastics have no property and no income, the laity has no time for full-time practice, and each supplies what the other cannot.