If we set our intention to be a witness to that inner voice and short circuit our habit of “owning” that voice, it will begin to lose its emotional charge for us. We can choose to remind ourselves that whenever we hear that voice that we are learning to change our response from believing we “are” the voice to merely witnessing that voice.
Just having this discussion with yourself and opening to the concept that you are not the voice and the voice is not you will begin the process of shifting your ability to short circuit the emotional charge from that voice and its rantings.
Creating an inner pause or choice point is part of the HeartMath method which assists in this process. This is a process which can be enhanced by a number of energy movement/clearing methods.
I use EFT, or HeartMath or a combination of the two techniques to help shift the negative energy of buying into that voice as “ME” and recognizing it is only my physiology trying to be helpful.