Despite his enormous achievements, however, and his lasting influence, Tertullian is not considered a Father of the Church; we don’t even call him “Saint” Tertullian: he chose, sadly, to follow his own judgment rather than that of the Apostolic Church, and fell into heresy in the latter part of his life.
Trappists and the Icarians: Merton’s Parable
". . . the monks had Christ living and working in them by faith, by charity. The monks were united by the Holy Spirit in the peace of God . . . But the Icarians were united only by the frail bonds of an “armed neutrality” of insatiable animal appetites."