The word seems to be used in this sense in the epistle of Jude 12: "These are they who are hidden rocks in your lovefeasts when they banquet with you."
In the intervening body of the epistle the writer also follows the regular form of a letter.
The fundamental theme of the epistle is The Unity of Mankind in Christ, and hence the Unity and Divinity of the Church of Christ.
The relationship, both literary and theological, between the epistle to the Ephesians and that to the Colossians is very close.
If the latter epistle could be finally established as genuine, or its date fixed, it would give important evidence with regard to Ephesians; but in the present state of discussion we must confine ourselves to pointing out the fact.