Revelation 7:2

“And I saw another angel, etc.] Not Constantine, who came from the eastern parts to the empire, with the true knowledge of God, and the authority of God to propagate it; and who repressed the four angels, or evil spirits, contention, ambition, heresy, and war, from doing the mischief they otherwise would; and sealed the saints, by giving them a platform of doctrine at the council of Nice, as Brightman and others think. But the uncreated angel, the angel of the covenant, the Lord Jesus Christ; for who but he should have the privy seal of heaven, who is the angel of the great council, as the Septuagint render (<230906>Isaiah 9:6) and who could speak in such an authoritative manner to the four…”

“from the east--Greek, "the rising of the sun." The quarter from which God's glory oftenest manifests itself.”

“And I saw another angel - Evidently having no connection with the four, and employed for another purpose. This angel, also, must have been symbolic; and all that is implied is, that something would be done as if an angel had done it. Ascending from the east - He appeared in the east, and seemed to rise like the sun. It is not easy to determine what is the special significancy, if any, of the east here, or why this quarter of the heavens is designated rather than the north, the south, or the west. It may be that as light begins in the east, this would be properly symbolic of something that could be compared with the light of the morning; or that some influence in “sealing” the servants of God…”

“And I saw another (a good) angel ascending from the east - The plagues begin in the east; so does the sealing. Having the seal of the only living and true God: and he cried with a loud voice to the four angels - Who were hasting to execute their charge. To whom it was given to hurt the earth and the sea - First, and afterwards "the trees." Revelation 7:3”

“And I: Rev 8:3, Rev 10:1; Mal 3:1, Mal 4:2; Act 7:30-32 having: Rev 7:3-8, Rev 5:2, Rev 10:4; Sol 8:6; Joh 6:27; Co2 1:22; Eph 1:13, Eph 4:30; Ti2 2:19 living: Deu 5:26; Sa1 17:26, Sa1 17:36; Kg2 19:4; Mat 26:63; Th1 1:9; Heb 12:22 to whom: Rev 1:3, Rev 8:7-12 Revelation 7:3”