The evil spirit answered them, “I know Jesus, and I recognize Paul—but who are you?” (Acts 19:15)
I found the evil spirit’s words interesting.
They certainly recognized Jesus and his authority over them. But they also were aware of Paul and the fact that through his relationship with Jesus, through his status as a child of God, Paul had authority over them too.
The question is, do we realize the authority that we have as children of God?
If we stand our ground, the Enemy has to back down. He has no power over us except what we let him have.
That’s why Paul tells us to stand our ground in Ephesians. (Ephesians 6:13-14)
That’s why James tells us to resist the devil in his letter. (James 4:7)
So remember the authority you have, child of God.
As John tells us,
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) 