Jude 1:19

These be they who separate themselves Namely, from the communion of the church and from other Christians, under pretence of their greater illumination; sensual Ψυχικοι, animal; not having the Spirit Having a natural understanding and natural senses, but not the Spirit of God, either as the Spirit of truth or grace, and therefore addicted to the low gratifications of their animal life; otherwise they would not separate themselves from the Church of Christ. For that it is a sin, and a very heinous one, to separate from it, is out of all question. But then it should be observed, 1st, That by the Church of Christ is meant a body of living Christians, who are a habitation of God through the Spirit, Ephesians 2:20. And, 2d, That by separating is understood renouncing all religious intercourse with them, no longer joining with them in solemn prayer, or the other public offices of religion.