17 Let honorable men, in the tradition of Ephrem - We mean the illustrious offspring of the monastic orders - preserve the dignity which arose with Anthony and Basil in the East. This was propagated later by offshoots in the West, and in many ways has been noteworthy for the Christian community. Therefore may these seekers of Evangelical perfection never cease to look up to and imitate the anchorite of Edessa. For a monk will profit the Church most when he exemplifies what his habit signifies to God and men, that is, according to a saying of the ancient Fathers of the East, he must be "a son of the covenant," and again "an Angel whose mission is mercy, peace, and the sacrifice of praise," as the blessed Nilus the Younger beautifully defines him.
Source: Principi Apostolorum Petro (Vatican.va)