Don,
You are not going to get any kind of grounded, rational comments from him. Not only is he not open to change and growth, which is the sign of a confident intellectual. But he does not even recognize that he has a problem. And that is the first step to growth. Sadly, he will not grow.

Unless you are talking past him to others reading this who may be interested in the discussion and open. Yeah, that could be it.

Saul