I read “Kingdom of the Cults” by Dr. Walter Martin, after the Mormons got to one of my sons, who know better. After I read that and several other sources I now look forward to that knock on the door from the Jehovah Witnesses, and Mormons especially. I consider it a mission field that come to me.
I invite them in and ask them if they’d like something to drink and talk about there purpose here today. Before I’m finished with them they are some what uncomfortable with my questioning, I listen to them and I ask questions, and more questions like… “Why don’t you believe in the Trinity? Then I shut up, listen. When they finish, I open the Bible and give them book and verse. After doing this a few times I go into the cult, why would you subject you and your family to this total control over your lives. By the time I’ve finished their eyes are wide open and their Elder is stammering and stuttering, they are looking for the exit by now.
But of course it would be rude to drink and run, so I usually get a few more salvos into their position. Before I’m finished, I hold an alter call and invite them to become Christians right here at my coffee table. I tell them my home is open to them anytime, I hand them a “Release from the Cult trak” and show them the door. The wide eyed, stunned look on their faces is my pay off for the adventure and maybe one of them will awaken to the real world and come over from the dark side. I pray for them after they leave and then go about what ever I was doing before they dropped by.