The fact that essentially all concepts in math, programming, physics etc. are just applications of fixed points which is predicated on the idea of nilpotence. Fixed points go by many names like invariance, spectra, diagonalization, embedding, braids etc.

By fixed point I mean something like the "Lawvere's fixed point theorem". https://ncatlab.org/nlab/show/Lawvere%27s+fixed+point+theore...

I have a braindump on this https://github.com/adamnemecek/adjoint

I also have a discord https://discord.gg/mr9TAhpyBW