John 17:11

Epistle of Mathetes to Diognetus

The soul dwells in the body, yet is not of the body; and Christians dwell in the world, yet are not of the world.[26]

Epistle of Ignatius to the Ephesians

For, says He, "Grant unto them, Holy Father, that as I and Thou are one, they also may be one in us."[33]

Tertullian Against Praxeas

He commended His disciples to the safe-keeping of the Father.[353]

Constitutions of the Holy Apostles Book VIII

and said concerning us to His Father, "Holy Father, although the world has not known Thee, yet have I known Thee; and these have known Thee."[4]

Origen Commentary on Matthew Book XIII

you must understand by the "world," that which is inhabited by us on the earth; for it was from this world that the Father gave men to the Son, in regard to whom alone the Saviour beseeches His Father, and not for the whole world of men. Moreover, also, when the Saviour says, "And I come to thee and am no longer in the world,"[129]

Origen Commentary on Matthew Book XIII

He speaks of the terrestrial world; for it is not to be supposed that He spoke things contradictory when He said, "And I come to thee, and I am no longer in the world," and "I am in the world." But also in this, "And these things I speak in the world,"[130]