Angels are messengers with a clear job description. They are "ministering spirits, sent out to render service for the sake of those who will inherit salvation" (Hebrews 1:14).
The devil tried to tempt Jesus with the ministry of angels. He took Jesus to the pinnacle of the temple, told Him to jump, and quoted from Psalm 91. "If You are the Son of God, throw Yourself down; for it is written, "He will command His angels concerning You"; and "On their hands they will bear You up, so that You will not strike Your foot against a stone" (Matthew 4:6).
Actually, the devil misquoted Psalm 91:11-12. The promise is one of daily care in the midst of everyday life. "He will give His angels charge concerning you, to guard you in all your ways. They will bear you up in their hands, that you do not strike your foot against a stone." Angels have the job of keeping those who will inherit salvation from stumbling.
Jesus is the great and precious stone presented to us in Scripture (1 Peter 2:7). To those who disbelieve, Christ is "a stone of stumbling and a rock of offense" (1 Peter 2:8, Isaiah 8:14). Angels have the extraordinary work of assisting those who will inherit salvation. They keep them from stumbling over The Rock, Jesus Christ. What a ministry!