3 Ways God Assists His People in Spiritual Conflict:
1. His Word – vv1-3
2. His Son – vv4-9
3. His Angels – vv10-11:1

The first thing we have to realize is that the Christian life is a warfare, that we are strangers in an alien land, that we are in the enemy’s territory. This is a warfare that you and I have to wage.
The Christian Warfare, 20
David Martyn Lloyd-Jones (Welsh Preacher and Writer)

CS Lewis stated there are two equal and opposite errors into which our race can fall about devils. One is to disbelieve their existence. The other is to believe and feel an excessive and unhealthy interest in them. They themselves are equally pleased by both errors.