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Today is what’s affectionately known by many preachers as “Heresy Sunday”. Devoting a week’s worship to the Holy Trinity SEEMS like a great idea in principle, but if you’ve ever attempted to explain the Trinity to anyone unfamiliar with the doctrine, you can understand why this is actually one of the most challenging Sundays of the year to preach. The Trinity is such a strange concept—three equal and unified persons of the same substance contained within a single God—that humanity has yet to discover an analogy that doesn’t accidentally slip into heresy in one way or another.