How to snap Jehovah's Witnesses out of it with 1 bible verse

I like Jehovah's Witnesses but when they chew over this verse they'll most likely quit the Kingdom Hall after thinking about it. Try it out yourself next time they come a knocking, or on the street. It works. Just remember 837.

Acts 8:37
Some manuscripts include here Philip said, “If you believe with all your heart, you may.” The eunuch answered, “I believe that Jesus Christ is the Son of God.”

https://www.biblegateway.com/passage/?search=acts+8&version=NIV