Should Christians invoke the help of St. Michael the archangel?
It depends on whom you ask. With this question, you come up against the question of sola scriptura of the Protestants versus established traditions of Catholics, who rely on traditional, historical beliefs as well as scriptures.
What do we know about St. Michael the Archangel? Who was Saint Michael the archangel? The Bible and church tradition that has been passed down through the generations give us some facts.
The name “Michael” means “who is like God?”
He is mentioned in the book of Revelation, warring against satan.
And there was war in heaven: Michael and his angels fought against the dragon; and the dragon fought and his angels, And prevailed not; neither was their place found any more in heaven. And the great dragon was cast out, that old serpent, called the Devil, and Satan, which deceiveth the whole world: he was cast out into the earth, and his angels were cast out with him. Revelation 12:7-9
He is mentioned in the Book of Daniel. The angel, Gabriel, was sent to speak to Daniel in response to Daniel’s prayers.
Then he said unto me, Fear not, Daniel: for from the first day that thou dist set thine heart to understand, and to chasten thyself before thy God, thy words were heard, and I am come for thy words. But the prince of the kingdom of Persia withstood me one and twenty days: but, lo, Michael, one of the chief princes, came to help me; and I remained there with the kings of Persia. Daniel 10:12,13
St. Michael is also mentioned in the book of Jude.
Tradition holds that it was St. Michael who met Joshua.
And it came to pass, when Joshua was by Jericho, that he lifted up his eyes and looked, and, behold, there stood a man over against him with his sword drawn in his hand: and Joshua went unto him, and said unto him, Art thou for us, or for our adversaries? And he said, Nay; but as captain of the host of the Lord am I now come. And Joshua fell on his face to the earth, and did worship, and said unto him, What saith my lord unto his servant? And the captain of the Lord’s host said unto Joshua, Loose thy shoe from off thy foot; for the place whereon thou standest is holy. And Joshua did so. Joshua 5:13-15
While Saint Michael the archangel has been the champion for God in battles in history, he is still warring for God today. This is why he is invoked by many though the prayer of St. Michael.
On April 24th 1994, Pope John Paul II recommended continued prayer. He recommended the St. Michael prayer.
“May prayer strengthen us for the spiritual battle we are told about in the Letter to the Ephesians: ‘Draw strength from the Lord and from His mighty power’ (Ephesians 6:10). The Book of Revelation refers to this same battle, recalling before our eyes the image of St. Michael the Archangel (Revelation 12:7). Pope Leo XIII certainly had a very vivid recollection of this scene when, at the end of the last century, he introduced a special prayer to St. Michael throughout the Church. Although this prayer is no longer recited at the end of Mass, I ask everyone not to forget it and to recite it to obtain help in the battle against forces of darkness and against the spirit of this world.”