Had a comp sci teacher do a decent job making an argument for the 3-in-1 as our limited three-dimensional interpretation of a multi-dimensional (4+) being. A multi-dimensional existence is going to interact with our three-dimensional world in ways that are impossible to interpret holistically since it extends into and is connected through dimensions that don’t exist for us. Like a tesseract, we have visual representations of tesseracts but they aren’t what a tesseract would actually look like if one appeared in front of you one day.