Summary: This is a Scriptural overview on the holy angels.
The angels were created by God before the earth was made:
Psalm 148:1-5, "Praise the LORD! Praise the LORD from the heavens; Praise Him in the heights! Praise Him, all His angels; Praise Him, all His hosts! Praise Him, sun and moon; Praise Him, all stars of light! Praise Him, highest heavens, And the waters that are above the heavens! Let them praise the name of the LORD, For He commanded and they were created."
Col. 1:15-17, "He is the image of the invisible God, the firstborn of all creation. For by Him all things were created, both in the heavens and on earth, visible and invisible, whether thrones or dominions or rulers or authorities all things have been created through Him and for Him."
Job 38:4-7, "’Where were you when I laid the foundation of the earth? Tell Me, if you have understanding, Who set its measurements? Since you know. Or who stretched the line on it? On what were its bases sunk? Or who laid its cornerstone, When the morning stars sang together And all the sons of God shouted for joy?"
They are innumerable:
Revelation 5:11, "Then I looked, and I heard the voice of many angels around the throne and the living creatures and the elders; and the number of them was myriads of myriads, and thousands of thousands."
Hebrews 12:22, "But ye are come unto mount Sion, and unto the city of the living God, the heavenly Jerusalem, and to an innumerable company of angels," (KJV)
They are a higher order than Man:
Psalm 8:3-8, "When I consider Thy heavens, the work of Thy fingers, the moon and the stars, which Thou hast ordained; What is man, that Thou art mindful of him? and the son of man, that Thou visitest him? For Thou hast made him a little lower than the angels, and hast crowned him with glory and honour."
They are eternal:
Luke 20:35-36, "but those who are considered worthy to attain to that age and the resurrection from the dead, neither marry nor are given in marriage; for they cannot even die anymore, because they are like angels, and are sons of God, being sons of the resurrection."
They are mighty in strength:
Psalm 103:20, "Bless the LORD, you His angels, Mighty in strength, who perform His word, Obeying the voice of His word!"
2 Peter 2:11, "...whereas angels who are greater in might and power..."
Holy angels (those loyal to God) are ministers of the Lord:
Psalm 103:20-21, "Bless the LORD, you His angels, Mighty in strength, who perform His word, Obeying the voice of His word! Bless the LORD, all you His hosts, You who serve Him, doing His will."
They praise and worship God:
Nehemiah 9:6, "You alone are the LORD. You have made the heavens, The heaven of heavens with all their host, The earth and all that is on it, The seas and all that is in them. You give life to all of them And the heavenly host bows down before You."
They deliver divine revelations to Man:
Galatians 3:19, "Why the Law then? It was added because of transgressions, having been ordained through angels by the agency of a mediator, until the seed would come to whom the promise had been made." Acts 7:53, "This is the one who was in the congregation in the wilderness together with the angel who was speaking to him on Mount Sinai, and who was with our fathers; and he received living oracles to pass on to you."