The Problem With Subjective Explanation

There appears to be a type of description of the way the mind works, which completely leaves out facts about the way things feel for me. Things feel a certain way for me. I have subjective experience to use Nagel's term. But when I describe a person's brain in third personal terms, the whole of that stuff is left out. So it looks like we have on one hand a description that gives us everything we want causally, but it leaves out the wayThings feel to me are essential. And you might think they need to somehow involve themselves in the description. We would lose a lot of what we think of as knowledge and we wouldn't be able to talk to one another