Please leave old friend

I have recently been vistited by an old "friend" of mine. He has set up residence here, although I have repeatedly asked him to LEAVE. He is the voice that defies reason, he is the little devil on my shoulder making me doubt everything I do and question all logical assumption. Sometimes he is so quiet I think he is gone, and sometimes he is so loud I cannot think of anything but shutting him up. Today he is loud and I decided, I am going to get on that treadmill and run him out of here, but of course while finally getting up to a jogging pace, he whispered in my ear, loud enough to hear over the whirring of the treadmill, loud enough to hear over the music from the television, "You know if you trip and fall off of this thing, there is no one here to help you-no one to take care of the baby, who will wake up hungry-with no one to feed him". I told him to shut up and kept on running. Of course I still heard his words, but I am trying my hardest to not give them substance. I am bound and determined to no longer LISTEN to him. I will eventually get him out of my life, out of my thoughts. For now I will just have to co-exist with him and hope he gets bored enough to leave.