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How to Use the Back of a Napkin to Prove to a Jehovah's Witness that Jesus Is God

Understanding the Trinity may be impossible, but proving that the Trinity is scriptural is not an especially difficult task. One needs only to define the Trinity accurately, then show that the Bible teaches the details of the definition. It makes no difference whether the word “Trinity” appears in the text or not. It only matters if the doctrine is taught there.

The definition of the Trinity is straightforward: there is only one God and He subsists as three distinct persons: the Father, the Son, and the Holy Spirit. One God in three persons. Simple.

How to Prove the Trinity

If you want to prove the Trinity, then, all you need to do is show that three specific truths are taught in Scripture. First, there’s only one God. Second, the Father, Son and Holy Spirit are truly distinct persons. Third, each has the essential attribute of deity. That’s it.

The first item–the oneness of God–is virtually uncontested by those challenging the Trinity on Scriptural grounds. Almost all who hold Scripture in high regard acknowledge the famous Shema of Deuteronomy 6:1, “”Hear, O Israel! The Lord is our God, the Lord is one! ”

The second, that the Father, Son and Holy Spirit are truly distinct persons, is denied by modalists like Oneness Pentecostals. They hold there is one God who manifests Himself in different “modes” at different times, sometimes as the Father and sometimes as the Son. The popular illustration of the Trinity that a man can be a father to his son yet, in other modes, a husband to his wife and a brother to his siblings is a fine illustration of this second-century heresy, and not the orthodox doctrine of the Trinity. In this view the Father and the Son are both fully God, but there is no genuine distinction between the persons, only a linguistic distinction.

The third, that the distinct persons are each fully God, is denied by Arians like Jehovah’s Witnesses. Jesus and the Father are distinct persons, they say, but do not share the essential attribute of deity. Only the Father is God. Jesus is a lesser, created “god.”

The Irrefutable Argument

My purpose is to answer the Arian challenge by giving an airtight, scriptural proof for the deity of Jesus Christ. This technique is so simple you should be able to sketch it out on a napkin from memory the next time someone knocks on your door. Remember, you don’t have to master every counter-argument to every verse thrown at you. All you need is one unequivocal textual proof to make your case. Here it is. It comes from the Gospel of John.

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