
Christiaan Huygens (1629-1695), portrait by Caspar Netscher (1670)
In 2010 I participated in a lengthy online written debate entitled “The Great Trinity Debate” with a Christadelphian named David Burke. I presented a defense of Trinitarianism and Burke defended Unitarianism (of the “Biblical Unitarian” variety). A few days after our opening statements, another Unitarian named Jaco Van Zyl posted a comment on a Unitarian website criticizing my use of the scientific study of light as an analogy. Van Zyl badly misrepresented what I said, making any response to his comment seemingly unnecessary. However, just a few months ago a popular Mormon blogger, Robert Boylan, quoted Van Zyl’s comment with approval, likewise completely misunderstanding the point of the analogy. Apparently, even something buried far down in the comments section on a blog eight years ago can be easily resurrected and given new life in cyberspace.
In his comment, Van Zyl wrote:
Firstly, and I hope Bowman will not make this rather amateurish mistake, this analogy sounds like “proof by illustration.” If, indeed, he is not trying to prove the validity of different “natures” in one “being” by using this example, it still does not do much for Bowman’s argument, and it brings me to my next qualm: Why use an illustration in which different natures of light has been confirmed, to prove the plurality of another (God), when this is exactly what has to be determined?
Van Zyl continues in this vein, raising various objections against using light as an analogy to illustrate or even to prove the doctrine of the Trinity. You can follow the link given above and read his entire comment. I won’t be responding to everything he said, but rather will be focused on his objection to my use of the scientific study of the properties of light as an analogy. Continue reading


Lydia McGrew




