Pope Shenouda III
How can the angels be God's and Christ's at the same time unless the Two are One? We have a good testimony at the end of the Book of Revelation: "And the Lord God of the holy prophets sent His angel to show His servants the things which must shortly take place" (Rev. 22:6), and in the same chapter: "I, Jesus, have sent My angel to testify to you these things" (Rev. 22:16). Also compare with the first verse of the Book of Revelation.