Angels are created ministering spirits, endowed with free will. The holy angels serve God as messengers and agents, are appointed to attend to those who will obtain salvation, and will accompany Christ at his return. The disobedient angels are called demons, evil spirits, and unclean spirits.

 

Hebrews 1:14

Are they not all ministering spirits, sent out to render service for the sake of those who will inherit salvation?

 

Rev. 1:1

The Revelation of Jesus Christ, which God gave Him to show to His bond-servants, the things which must soon take place; and He sent and communicated it by His angel to His bond-servant John,

 

Rev. 22:6

And he said to me, "These words are faithful and true"; and the Lord, the God of the spirits of the prophets, sent His angel to show to His bond-servants the things which must soon take place.

 

Matthew 25:31

"But when the Son of Man comes in His glory, and all the angels with Him, then He will sit on His glorious throne.

 

2 Peter 2:4

For if God did not spare angels when they sinned, but cast them into hell and committed them to pits of darkness, reserved for judgment;

 

Mark 1:23

Just then there was a man in their synagogue with an unclean spirit; and he cried out,

 

Matthew 10:1

Jesus summoned His twelve disciples and gave them authority over unclean spirits, to cast them out, and to heal every kind of disease and every kind of sickness.