The holy Scriptures, from beginning to end, are filled with mentions and descriptions of the Heavenly Host: not to believe in angels is not to believe in the Bible. In the heavens they behold the face of God, eternally hymning His glory. They are intimately involved with mankind as well: an angel is appointed guardian over every nation, and over every individual Christian. The Archangels Michael and Gabriel, whom we especially commemorate today along with all the other bodiless powers, have served as messengers to man. "Michael" means "Who is like God?";"Gabriel" means "God is mighty." Gabriel especially was appointed to announce the coming of Christ in the flesh.
  There is no reckoning the number of the Heavenly Host, though we know that they are a great multitude. They are ranked in nine orders, called Thrones, Cherubim, Seraphim, Dominions, Powers, Authorities, Principalities, Archangels and Angels. "Angel" means "herald" or "messenger" and is properly applied only to those who serve as messengers from God to man; but the name is often applied to the entire host of bodiless powers.
  Though bodiless, the angels are finite in knowledge, extension and power. The angel Lucifer, once the highest of them all, desired to be like God Himself, and was cast forever from the presence of God, along with countless others who followed him. These we now know as Satan and the demons. (Needless to say, they are not commemorated today).