The Theory of Modularity. After enough time and case evidence there came a point around 2004 where I realized that every experience, every idea, everything tangible and imagined exists as a module of something greater. Also, similar modules can be interchanged, copied, and resized. Like a scrap of paper torn from a sheet, that came from a ream, shipped in a box, and composed of pulp, formulated by atoms, built of yet smaller particles, all that exists can be contemplated as parts of a system boundless by size, yet universally applicable.
Never waste a thought. It will be useful, though the application may not be understood today.
For your consideration: Every Black Hole Contains a Universe?