I believe it is C.S. Lewis I'm about to paraphrase to include a few examples I witnessed personally.

Two of Satan's greatest tricks are convincing some people he doesn't exist and convincing other people that he is responsible for every little problem they ever did or ever will experience to include pop culture they don't like, politicians they don't like, the phone ringing while you're watching a sermon on Youtube, and their teenaged children behaving like teenagers.