They live in their own lands, but as sojourners; they share all things as citizens, and endure everything as foreigners. They marry, like everyone else, have children, but they do not expose their infants (i.e., to infanticide). They share a common table, but not the marriage bed. They are in the flesh, but do not live according to the flesh. They spend their days on earth, but their citizenship is in heaven.
Letter of Mathetes to Diognetus, AD 130