Quantum physics tells us that nothing is solid, everything is energy. And Albert Einstein says that “energy cannot be created or destroyed, it can only be changed from one form to another”.
In our perceptions of the eyes, ears and other senses, we forget that. Our nervous systems are entrained to only see a certain reality. The truth is that the reality you perceive can be different from another person's. It was particularly evident with that damn blue & black dress (white and gold!). If you don’t know what I’m talking about, google it. It drove me insane for days! So, I’m not going to go into that here...