I agree it can be so, and this is so because there is no genuine difference between talking to oneself, and talking to others.I find it (talking to myself) cathartic and a relief at times that can lead to euphoric resolutions.
I emphasize "genuine", meaning the same one is thinking the thoughts that are heard, whether spoken by one's own mouth, thought about, or spoken by another.
What is this leading to, my words here?
There are variations in pitch, volume and quality; variations in apparent perspective; the same consciousness hears. It is the eternal listener, the eternal seer.
It has never been seen. Thus, it is its exact content, from moment to moment. There is nothing else.
Clarity on this will relieve it of you
Peace...