Among Seventh-day Adventists, the quick and dirty solution to the identity of Michael in the Bible is that Michael is the pre-incarnate Jesus Christ, who leads the cosmic conflict against Satan (SDABC, 7:809, cf. 3SG 38; DA 99; Appendix to PP 761). Adventists tend to take their lead from Ellen G. White, who in Desire of Ages, page 99, quotes Daniel 10:21 as follows: “There is none that holdeth with me in these things, but Michael [Christ] your Prince.” Her assertion is affirmed by the editors of Patriarchs and Prophets, who comment on page 761: “Christ . . . was revealed to [the prophets] as the Angel of Jehovah, the Captain of the Lord’s host, Michael the archangel.” But nowhere in Scripture is Jesus called ever Michael. That equation may be implied in some places, but it is not stated beyond a reasonable doubt.
Aside from incidental genealogical references, the name Michael, as a heavenly being, appears five times in the Bible; three times in the book of Daniel and one each in the New Testament books of Jude and Revelation. In this blog series, I survey the major positions on Michael in the Bible and offer a contribution or two to the topic drawn from the literary context of the Michael reference in Revelation 12. Since Revelation 12 is probably the key chapter in the Bible for the cosmic conflict, this study will also contribute to understanding of that larger theme. To be continued. . . .
I am an Adventist and when talking to people about Michael being Christ, I use nothing from Ellen White to prove they are one and the same. The Scripture does this very easily alone.
Let me know if you have a point or two that I missed.