In the course of preparing a sermon I did the other week on the Trinity, I was going through all the usual images and analogies people use to try to illustrate or explain it (a group which runs all the way from bad to incipiently heretical) when I ran across one I’d never heard before that actually has something to recommend it. Believe it or not, there are those who argue that the structure of our government was influenced by trinitarian theology. As history, I don’t know what to make of that—it’s an interesting idea, but I haven’t seen any primary sources that support it—but as an analogy, it has its points. There is a certain hierarchy and structure to our branches of government, but none of them are dominant; each does different things; and the relationship between them constitutes our government and makes things happen. Thus, for instance, laws are passed by the legislative branch, executed and administered by the executive branch, and enforced by the judicial branch.
Of course, like any analogy, this one has its dangers (including the temptation to snipe about the tendency of government to think it’s God) and its limits: God is unlimited and perfect, while our government is limited and imperfect (though it occasionally forgets the fact) because it’s composed of limited and imperfect people. It also, however, has this advantage, that it points us to one reason why the doctrine of the Trinity matters. The structure of our government is intrinsically relational—each branch acts on the others and is acted on in turn, and it’s those actions and relationships that actually constitute the workings of our government.
Unlike the Trinity, of course, no one would ever describe the interrelationships of the three branches as a dance, but like I said, every analogy has its limits. It remains clear even so that our government is fundamentally different from what one might call a unitarian government (such as a monarchy or dictatorship)—it’s not just a different version of the same thing, but something truly different in kind. In the same way, the Triune God is profoundly different in being from any unitarian god we might imagine, and that difference is of fundamental importance.