>If you think you understand quantum mechanics, you don't understand quantum mechanics.
Feynman

>Anyone who is not shocked by quantum theory has not understood it.
Bohr

>Quantum mechanics makes absolutely no sense
Roger Penrose

>Quantum mechanics, that mysterious, confusing discipline, which none of us really understands
Murray Gell-Mann

Can someone tell me what these midwits mean when they say quantum physics is confusing or strange? Why is everyone so shocked about models that function differently to the world they see around them? I've completed two textbooks on quantum physics, followed the mathematics without a problem, and at no point did I think "wow that's sooo weird, le particle doesn't behave like a ball! xD"