True confession.

In a systematic theology class, I may have encouraged a student to use mashed potatoes as a metaphor for the Trinity. In my own defense, it allowed us to talk about the integrity of three separate flavors (salt, butter, potato) that together made up the unified thing we know as mashed potatoes. A concrete, if untraditional, example of three-in-one. Even better, it allowed us to explore other themes like modalism and the economic/imminent Trinity with a working metaphor to anchor an abstract discussion.