I don’t understand quantum mechanics.

“I think I can safely say that nobody understands quantum mechanics.” ­-- Richard Feynman

“Young man, in mathematics you don’t understand things. You just get used to them.” – John von Neumann.

The latter quote didn’t occur in response to Feynman, which might be hinted at by the subjects not being aligned, but together they serve my point.

Both these men were terrifyingly intelligent and worked as physicists at least some of the time. If they couldn’t understand quantum mechanics, then we mortals don’t have much of a chance.