The conversations I have with my myself always boil down to one thing:

Me: "Why aren't you...I mean, why are you the person you are?"
Myself: "What are you? Life? You can't say that to me. Only life can say that to me. And does."
Me: "And what do you say to that?"
Myself: "I don't know"
Me: "You don't know? Or 'I don't know'?"
Myself: "I guess...both"