And he dug it, and gathered out its stones, and planted it with the choicest vine, and built a tower in the midst of it, and also made a winepress in it: and he expected that it should bring forth grapes, and it brought forth wild grapes.
All Commentaries on Isaiah 5:2 Go To Isaiah 5
Ambrose of Milan
AD 397
He fenced it [the church] in with a rampart, as it were of heavenly precepts and with the angels standing guard, for “the angel of the lord shall encamp round about them that fear him.” He placed in the church a tower, so to speak, of apostles, prophets and teachers, ready to defend the peace of the church. He dug around it, when he had freed it from the burden of earthly anxieties. For nothing burdens the mind more than exaggerated solicitude for the world and desire either for wealth or for power.