Eventually you just bump your head against fundamental concepts that can't be dissolved. This can be solved if you can perfectly represent the concepts mathematically, but if you can't I don't know where to go from there.

There may be undissolvable concepts in communication (words, mathematical symbols), which is an interesting question in its own right, but as single intelligences we aren't limited to communication devices for our thinking. Are we?

In answer to "where to go from here," I think we can imagine things far subtler than we can reliably convey to another mind. My answer has always been to think without words.