Some cults try to distort the word of God to fit their beliefs. This must be pointed out. One of these cults is the Jehovah's Witnesses.
Jehovah's Witnesses have a love for Jehovah, but do not know how much He loves them. They have a love for Jesus, but do not know how great He is. They are misinformed on the gospel of Jesus Christ.
The gospel found in God's word is simple. God is the Creator of all things. God is holy and mankind is sinful. God's holiness and justice demands that a penalty be paid for sin. God came to earth in the form of a man to die and pay the penalty for sinners. By His grace, those who place their faith in Him have been forgiven of their sins.
The Jehovah's Witnesses gospel differs from this gospel. As Paul told the churches of Galatia, "I am amazed that you are so quickly turning away from Him who called you by the grace of Christ and are turning to a different gospel - not that there is another gospel, but there are some who are troubling you and wanting to change the good news about the Messiah. But even if we or an angel from heaven should preach to you a gospel other than what we have preached to you, a curse be on him! As we have said before, I now say again: If anyone preaces to you a gospel contrary to what you received, a curse be on him!".
We must use the Word of God to correct this false gospel and share the true gospel to the Jehovah's Witnesses with love! We have a mission field of unbelievers knocking on our doors to talk to us about Jesus. It doesn't get much easier than that!
The Jehovah's Witnesses have spent great amounts of time studying the Watchtower teachings and have been taught how to respond to most all questions they are presented. Our job is to present the truth and place seeds of doubt in their mind while the Holy Spirit does the rest.