There are two wrong ways to think about spiritual warfare. The first way is to become obsessed with it. In this approach, every time your car breaks down, it’s a demon’s fault. The second way is to reject the spiritual world all together. This happens when you encounter someone who is legitimately demon-possessed and always classify their condition as a medical one or a mental one but never a spiritual one.
Satan is content with Christians making either of these two mistakes.
Thankfully, there is a third option, as explained in this video by John Piper.