“All men by nature desire to know” (Aristotle).[1] Despite respective differences, one thing unites “non-Christian Believers in God:” All, at least on some level, recognize and yearn for “something greater.” Evangelizing non-Christian believers in God requires logical and personalistic approaches that build upon this recognition and yearning. To this end, there are a few arguments that the evangelist can use in a discussion: 1) Lord, Liar, Lunatic or Legend, 2) prophecies, 3) miracles and private revelation. The Lord, Liar, Lunatic, or Legend argument makes the case that Jesus Christ cannot be a good moral teacher if He is not also God. The argument from prophecies shows that biblical prophecies reveal a God who loves us and wants us to know Him. The argument from miracles and private revelation shows God’s continual care and providence for His people in the present. Personal testimonies and stories add to these arguments by presenting a sincere witness to the Faith. Lastly, dealing with Mormons and Jehovah’s Witnesses (and other non-christian theist groups) often requires respectful, yet honest questioning of their viewpoints.
[1] Aristotle, Metaphysics, Book 1, part 1.