Let's dispense with the wings idea that so many think angels must have:
Angels look exactly like you or I. They have the ability to move between the natural and the supernatural. We don't understand the supernatural, we barely understand the natural!
In the bible, we find both kinds of angels: the followers of God, Angels, and the fallen of Satan, Demons.
Angels do not have the power to take souls or lives unless God allows it so. Angels are servants of God.
Demons do not have any power over us...when we stand with Jesus Christ. Demons have chosen to serve Satan.
The deception of Satan was so powerful that he decieved one third of the Angels to follow him and become demons. Mankind does not know half of what an Angel or demon knows.
Does this mean that angels or demons are more powerful than man?
Those that follow Jesus Christ, are born again of Him, and have recieved the Holy Spirit, are the sons and daughters of God, that is, Saints. Every Saint is given power over his and her enemies, but it is not our power, but Christ's power through us. Every Saint is limited to God's will.