I have a friend whose research requires a thorough understanding of quantum mechanics. She told me that she feels like she understands quantum mechanics, until she stops and thinks about it in a way that isn’t limited to the equations and data that she’s used to manipulating. Then, it blows her mind so much that she feels like she has to sort of “reboot” her brain and tell herself “it’s okay, just don’t think about it too much bro”. I find this hilarious, and quite relatable (even though I know relatively little of quantum mechanics)