In most religions, the life inside monasteries is governed by community rules that stipulate the gender of the inhabitants and require them to remain celibate and own little or no personal property. The degree to which life inside a particular monastery is socially separate from the surrounding populace can also vary widely; some religious traditions mandate isolation for purposes of contemplation removed from the everyday world, in which case members of the monastic community may spend most of their time isolated even from each other. Others focus on interacting with the local communities to provide services, such as teaching, medical care, or evangelism.