An angel is a created spiritual being that serves God, worships him, and acts as his messenger.
Angels, like people, have free will; they can choose to serve God or rebel against him. Angels who rebel against God serve Satan or the devil (Matthew 25:41 and Revelation 12:9)
Though there are attempts in the Bible to describe what angels look like, the one inescapable conclusion is that they are awesome in appearance. This is because often the first thing angels say when they appear to people is “Do not be afraid” or “Fear not.”
Key verse about Angel: “He replied, ‘The Lord, before whom I have walked faithfully, will send his angel with you and make your journey a success, so that you can get a wife for my son from my own clan and from my father’s family (Genesis 24:40, NIV)
[Matthew 28:5, Luke 1:13, Luke 1:30, Luke 2:10,and Revelation 1:17]
A lifelong student of the Bible, Peter DeHaan, PhD, wrote the 1,000-page website ABibleADay.com to encourage people to explore the Bible. His main blog and many books urge Christians to push past the status quo and reconsider how they practice their faith in every area of their lives.