"The brain is three pounds of stuff. You can lay it on a table and probe it. But this sensation of consciousness is a subjective experience. There is a gap between the objective and subjective that makes it very difficult to understand how consciousness emerges from the material brain. I don’t have any answers, and I think philosophers and neuroscientists don’t yet have answers either. It’s really one of the most interesting fundamental questions in science."

https://lareviewofbooks.org/article/does-a-final-theory-exist-a-conversation-with-alan-lightman/