You had an opportunity I could only dream of. I've never had access to a mentor of any kind, on the job or otherwise. I still hope to have one someday. That

You had an opportunity I could only dream of. I've never had access to a mentor of any kind, on the job or otherwise. I still hope to have one someday. That he would spend that kind of time with his students (undergrad? grad? I don't know or care.) is impressive and says a lot.