My personal realization was that whatever we experience as our consciousness is necessarily a perception, including “what it feels like” to be a conscious being, or what is being referred to as qualia. If you didn’t perceive it, you wouldn’t be aware of it. So there’s nothing we talk about here that is not a perception. And, while being a quite complex perception in content and structure, it is certainly representable in our brain, including the self-referential loop that lets us have an experience of our experience. This insight came by practicing meditation for a while, where after some time you realize that there’s really nothing there but what you perceive. Your thoughts and feelings are just something you perceive. Your feeling of self is just something you perceive. The texture of all the various experiences you have is just something you perceive. The realization of having a realization is just something you perceive. The feeling of perceiving any of those things is itself just something you perceive. And perception just means input. As far as I’m concerned, that’s all there is to the “hard” problem.