Quis ut Deus?
"Michael" appears as the name of several men in the Old Testament. In the Book of Daniel it is the name of the "prince" of the people of Israel. In the New Testament the name is given to an archangel in the Epistle of Jude 1:9 and, in the Book of Revelation 12:7, to the leader of angels who defeat "the dragon" and his fallen angels, a dragon identified in Revelation 12:9 as "that ancient serpent, who is called the devil and Satan, the deceiver of the whole world".
The sentence Quis ut Deus? is particularly associated with Archangel Michael. In art St. Michael is often represented as an angelic warrior, fully armed with helmet, sword, and shield, as he overcomes Satan, sometimes represented as a dragon and sometimes as a man-like figure. The shield at times bears the inscription: Quis ut Deus, the translation of the archangel's name, but capable also of being seen as his rhetorical and scornful question to Satan.
- Numbers 13:13, 1 Chronicles 5:13-14, 6:40, 7:3, 8:16, 12:20, 27:18, 2 Chronicles 21:2, Ezra 8:8
- Daniel 10:13, 10:21, 12:1
- John Elven, 1854, The book of family crests Henry Washbourne Publisher, page 112
- Ann Ball, 2003 Encyclopedia of Catholic Devotions and Practices ISBN 0-87973-910-X page 520
- Catholic Encyclopedia
- Studies in Revelation by Hampton J. Keathley, 3rd, J. Hampton Keathley III 1997 Biblical Studies Press ISBN 0-7375-0008-5 page 209 
- John F. Sullivan, 2009 The Externals of the Catholic Church ISBN 1-113-71408-5 page 202
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