Very interesting quote, and I think in a sense that even hard sciences like physics are not only a study of the "external world", but also the "internal world" that our mind creates to represent it. So much of the conversation around quantum mechanics isn't really about the math or science, which really isn't that complicated, but around how it can be that what is _really_ happening is so different from what we perceive to be happening in our minds.
I think every break through in theoretical physics is sort of inextricably tied with a breakthrough in the study of consciousness. You have to understand both how the world works and also how the mind translates that to conscious experience of the world to really have something that most people will see as an explanation.
An understanding of light, for example, is not just an explanation of the math underlying electromagnetic waves, but also how the eye perceives those waves and translates that into vision.