As an exJW I can tell you that they are trained to dance all over the Bible. You bring a point up about the Deity of Jesus and they will ignore it and say "Well what about Hell in this verse?"
Theres only one important point and thats the Deity of Jesus, if you can show that, their whole Theology falls apart.
I have had extensive training in sales and sales management and I use that on them when they come.
When they arrive at the door, be incredibly polite.
1. Tell them you have some questions and that you are interested in what they have to say.
2. Ask them how much time they have, this is important. Otherwise they will lie or make excuses to get away, when you are getting to them.
3. Ask them to use a good Bible only that you both can agree too. I use the KJV usually.
4. Get them to agree to use the Bible only and put all other books away. This is important.
Now you invite them in, sit them down and say:
"I only have one question, IF I can show you in the NT, that there are 3 separate person called God, would you be prepared to believe it?"
Now you might have to state that a couple of times and stress the "IF". They may say, "Its not in there"
You keep on target and say "Well, "IF', I can show you, will you believe it"?"
Eventually they will agree. Now YOU have control.
But tie one more thing down before you start. Say to them:
"I would like to show you a verse or two, and I would like you to give me your feelings on what it means. Now, I would like just to talk about the verse at hand and not jump all over the Bible, is that ok with you?"
So if they start trying to jump all over the place remind them that is not what you wanted:
"Mr JW remember earlier I asked that we stick to the verse at hand because I really want to get at the meaning of this particular verse"
If you do that once or twice they get the picture.
As you go through, just ask questions for example:
Isaiah 44:6 Thus saith the LORD the King of Israel, and his redeemer the LORD of hosts; I am the first, and I am the last; and beside me there is no God.
Now, Mr JW who is the First and Last?
He will say Jehovah
Ask "Are you sure?"
He will agree.
Is anybody else the First and Last?
He says no.
You reply ok, then lets go to Rev 1:17-18
Revelation 1:17 And when I saw him, I fell at his feet as dead. And he laid his right hand upon me, saying unto me, Fear not; I am the first and the last:
Revelation 1:18 I am he that liveth, and was dead; and, behold, I am alive for evermore, Amen; and have the keys of hell and of death.
Now when you read those verses stress the "I am the first and the last"
Then turn around and ask "When did Jehovah die?"
Dont tell him!!! Ask him
Next verse:
"This is Jehovah speaking":
Zechariah 12:10 And I will pour upon the house of David, and upon the inhabitants of Jerusalem, the spirit of grace and of supplications: and they shall look upon me whom they have pierced, and they shall mourn for him, as one mourneth for his only son, and shall be in bitterness for him, as one that is in bitterness for his firstborn.
When was Jehovah pierced?
Hebrews 1:8 But unto the Son he saith, Thy throne, O God, is for ever and ever: a sceptre of righteousness is the sceptre of thy kingdom.
Why did Jehovah call the Son "God" when theres only one God?
Hebrews 1:6 And again, when he bringeth in the firstbegotten into the world, he saith, And let all the angels of God worship him.
If we are only allowed to worship God, why did Jehovah "command" we worship Jesus?
Psalms 90:2 Before the mountains were brought forth, or ever thou hadst formed the earth and the world, even from everlasting to everlasting, thou art God.
Would you agree that only Jehovah comes from everlasting? (They agree)
Are you sure? (They agree)
Lets look at this:
Micah 5:2 But thou, Bethlehem Ephratah, though thou be little among the thousands of Judah, yet out of thee shall he come forth unto me that is to be ruler in Israel; whose goings forth have been from of old, from everlasting.
Why is it that the Messiah came from everlasting and only Jehovah comes from everlasting?
* Pose a verse
* Ask a question
Lead them, dont push them!!