A single flame
I wonder if part of the reason the writers of the Gospels told so many stories about Jesus driving demons out was to refer to the fact that evil cannot thrive in the face of goodness. A single flame can cast out darkness and the darkness cannot overtake the light. The demons recognized God in Jesus and I believe those with evil can recognize those filled with goodness and God’s light.
Be filled with goodness and cast out the darkness in your life.