30. Angels and spirits are people, and this can be seen from the ones who appeared to Abraham, Gideon, Daniel and the prophets, especially to John when he wrote the book of Revelation, and also to the women at the Lord's tomb. Indeed, the Lord Himself appeared to the disciples after His resurrection. These appearances occurred because the eyes of the spirit of the people who saw them were opened, and when the eyes of the spirit are opened, angels appear in their true form, which is human. But when the eyes of the spirit are closed, that is, when they are covered over by the sight of eyes which draw all their sensations from the material world, then angels and spirits do not appear.