Quotes from Robert Oerter

If you have never read about quantum mechanics before (perhaps even if you have), you will no doubt find it confusing, maybe incomprehensible. If you do, take heart! As the brilliant (and Nobel prize-winning) physicist Richard Feynman put it: It is my task to convince you not to turn away because you don't understand it. You see, my physics students don't understand it either. That's because I don't understand it. Nobody does.

Two phenomena in particular triggered the quantum revolution: the photoelectric effect and the structure of the atom.

Quantum mechanics completely overturned the classical worldview.