It is written, “ ‘The Lord will command his angels to take good care of you.
They will lift you up in their hands. Then you won’t trip over a stone.’ ” (Psalm 91:11,12)
The devil said to him, “If you are the Son of God, tell this stone to become bread.”
Jesus answered, “It is written, ‘Worship the Lord your God. He is the only one you should serve.’ ” (Deuteronomy 6:13)
That comes as no surprise. Even Satan himself pretends to be an angel of light.
All angels are spirits who serve. God sends them to serve those who will receive salvation.