If I drive out demons by the finger of God, then the kingdom of God has come upon you. (Luke 11:20)
As we think about spiritual warfare, and specifically the Enemy we battle, we sometimes lose sight of an important truth.
God is much more powerful than Satan. Satan is not God’s equal.
God is the Creator. Satan is merely a creature.
And God needs but his little finger to overcome Satan.
So as we face spiritual battles in our lives, let us go with confidence in the one who dwells in us. For as John wrote,
You are from God, little children, and you have conquered them, because the one who is in you is greater than the one who is in the world. (1 John 4:4)
Moment to Moment (Bible blog) 