**You have to demonstrate the value to a Deist. It is the show me don’t tell me version of religion.
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Christ has shown himself for 2,000 years. The Deist needs to open up his heart as well as his head.
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If Christianity could be gotten by reason alone there would be no need for faith and probably no such thing as Deists. **
Christianity is rational but it cannot be gotten by reason alone. The heart has reasons that reason cannot understand, as Pascal so wisely observed. So far as the Deist is concerned, he has a strong head but a weak heart.
There is a famous painting by William Holman Hunt of Jesus standing at a cottage door and knocking. What’s so curious about this painting is that there is no knob or latch visible on the door. The significance of this is that the door represents the human heart, and it can only be opened from the inside.
biltrix.com/2012/04/14/behold-i-stand-at-the-door-and-knock-william-holman-hunts-light-of-the-world/