Just because you're paranoid doesn't mean they're not after you.
The stoner culture did an excellent job exploiting paranoia to make it sound like it's only ever a delusion. Don't get me wrong; I hypothesize that in specific contexts, demonic influence indeed stirs up paranoid delusions in individuals. Every person is susceptible to this.
But as a Catholic, I believe that what some might think is “paranoia” is actually Counsel. One of the seven gifts of the Holy Ghost that warns us of the deceits of the devil and the dangers to salvation.
I recall the first Pope of the Church advising us of this. We have his encyclicals to read too, y’know 🙂
Be sober and watch: because your adversary the devil, as a roaring lion, goeth about seeking whom he may devour. [1 Peter 5:8]