Luke 1:26–38: What Seeing an Angel Means
Mary's encounter with Gabriel is not mainly about the angel. It is about the message he carries: the Son of the Most High will be born, and his kingdom will never end.
Psalm 91:11–12: Angels Who Guard God's People
Psalm 91:11–12 pictures angels sent by God to guard the person who has made Yahweh a refuge. They are servants under his charge, not independent powers to be sought or prayed to.