Consider the equation: 1+1=2 You don't have to understand the mathematical explanation for why this is so (one does exist) in order to have an intuition that s

Consider the equation: 1+1=2 You don't have to understand the mathematical explanation for why this is so (one does exist) in order to have an intuition that serves you well in practically all situations. For most of us, there is no deeper understanding. It just is, and that's good enough. That doesn't necessarily mean there is no deeper understanding, but let's ignore that for now. What I was trying to get across is that basic intuitions we have about the macroscopic world that we can see and touch are often flat-out wrong on the quantum scale. Likewise, human language has developed to describe macroscopic phenomena and struggles to capture the meaning of quantum phenomena. Intuition and language are crucial parts of understanding, but we find ourselves on treacherous ground when we try to apply human language or intuition to quantum systems. The confidence that comes with intuition and mastery of language are wholly counter-productive in quantum physics. You need to constantly reexamine what you think you know in the light of both new discoveries and the math. Both are sources of continual surprise. Hence, if you think you understand quantum physics, you probably haven't given it enough thought.