The key to reaching Jehovah’s Witnesses is by asking them the right questions that will get their thinking wheels spinning. This is because their mode of brainwashing is often so thorough that it’s almost difficult to reach them by engaging them in a Bible verse shooting contest. I’ve walked that path before and I can tell you it leads nowhere.
The right questions are aimed at making them realise that what the Watchtower Society teaches doesn’t agree with the Bible. That should be the crux of your arguments. If you ask the wrong questions (e.g. “Why don’t you people preach about heaven?” or “Why do you reject blood transfusion?”) or make direct attacks (e.g “You guys are rank heretics”), you will likely get into a Bible ping pong game that will leave both parties exhausted and exasperated.
Many Christians have missed vital witnessing opportunities because of negative attitudes. An informed, tactful and respectful approach to Jehovah’s Witnesses will work better than a bullying, aggressive and demeaning attitude.
Sadly, I’ve listened to Christians (even pastors) boast of how they shouted on and talked down at JWs and even banned them from coming to their houses! That is not only a display of immaturity and insecurity, it’s also unchristian.
The more we do that, the more we reinforce the negative ideas drilled into their minds about “Christendom” (a rather derogatory term JWs use for Christianity) and convince them of their errors. A better approach can start out by asking them, “What would you do if you found out that what the Watchtower teaches is not what the Bible teaches? Who would you obey? Jehovah God or the Watchtower?”
When you use the term “Jehovah God,” it resonates with them. This question is to probe the JW’s readiness to find the truth. Look for his/her reaction. If he admits he is willing to obey God, proceed. If he says it’s the Society he wants to go with or refuses to answer the question, you may have a tough one on your hands.
The Mediator role of Christ is an example to use. Paraphrase 1 Timothy 2:5-6 and ask, “Is Jesus your Mediator?” He will answer “Yes.” Tell him that Jesus is also your Mediator. You both agree on that after all, God’s inspired Word says so. You can then inform them, “But the Watchtower says Jesus is mediator only for the 144,000.”
Here are some quotes:
“The red wine represents Jesus’ blood. That blood makes valid the new covenant. Jesus said that his blood is poured out “for forgiveness of sins.” Humans can thus become clean in God’s eyes and can enter into the new covenant with Jehovah. (Hebrews 9:14; 10:16, 17) This covenant, or contract, makes it possible for 144,000 faithful Christians to go to heaven. There they will serve as kings and priests for the blessings of mankind …
“Who should partake of these Memorial emblems? Logically, only those in the new covenant – that is, those who have the hope of going to heaven – should partake of the bread and wine” (What Does the Bible Really Teach? 2005, 207)
“After instituting the Lord’s Evening Meal, Jesus made a covenant. (Read Luke 22:28-30.) Unlike other covenants, in which Jehovah is one of the parties to the covenant, this is a personal covenant between Jesus and his anointed followers. Thus, the Kingdom covenant is made with the 144,000 anointed Christians” (The Watchtower October 2014, par. 15-16).
“He mediates the new covenant between God and those taken into the new covenant, the congregation of spiritual Israel. (Heb. 8:10-13; 12:24; Eph. 5:25-27) … Holding the offices of Mediator and High Priest, Jesus Christ, being immortal, is always alive and able to plead for those of spiritual Israel approaching God through him, so that he can mediate the new covenant until these persons receiving his mediatorial assistance are saved completely. (Heb. 7:24, 25)” (Insight on the Scriptures, Vol. 2:360-363).
From these quotes, it can be seen that while the Bible says Jesus is our Mediator, the Watchtower says He only mediates for the 140,000 ‘anointed class.’ Unless the JW at your door is part of the ‘spiritual Israel,’ according to the Society, he is wrong to say Jesus is his Mediator.
This takes the question back and the Witness realises this contradiction. You can ask them, “If Jesus mediates for only 144,000 people, who then mediates for the ‘great crowd?’ Actually, the great crowd have to look up to the ‘spiritual Israel’ i.e. Watchtower Society as mediators:
“That faithful slave is the channel through which Jesus is feeding his true followers in this time of the end. It is vital that we recognize the faithful slave. Our spiritual health and our relationship with God depend on this channel. – Matthew 4:4; John 17:3.” (Insight on the Scriptures, Vol. 2, 362, par. 2)
In other words, those making up the faithful slave have one mediator (Jesus) but all other JWs have the 144,000 (anointed class) as mediators. So the relationship of the great crowd Witnesses with God and their receipt of God’s blessings depend on their relationship with the 144,000 elites. This is as far from the Bible as the North pole is from the South pole.
If Jesus became the “mediator of a new covenant” (Heb. 9:15) by His blood and His shed blood made forgiveness of sin possible, by claiming He is Mediator of only 144,000 people, the Watchtower leadership is implicitly teaching that Christ’s ransom and all its benefits apply only to the ‘spiritual Israel.’ Of course, the Bible never taught that Jesus died for only 144,000 people. The blood of His covenant applies to as many receive Him, making the forgiveness of sin possible (Heb. 7:25; 9:22; 1 Tim. 2:6 etc).
If the Witness is still not convinced of the deviation of Watchtower leadership from God’s inspired Word, you can use the crucifixion and bodily resurrection of Christ to establish your arguments. Encourage him/her to study further if not persuaded. They must reach the point where they will choose between following God’s inspired Word or the uninspired Watchtower Society.