I would say, "Tell me what my trouble is again?"
"Tell me who I am again, so I will know next time I come to therapy?"

That would NOT go over well with me. I may not know all of who I am, but there is no way that someone else is going to convince me that I am some way or the other (again).

Take this seriously, and tell him exactly how you feel. Tell him this is NOT who you are, and if he can't see you any other way, then he needs to get a consult.

Tell him that you need a therapist, not a psychic. Tell him that his crystal ball just won't cut it for you.

Keep us posted.