In reference to the voice we all have in our heads:
The best way to free yourself from this incessant chatter is to step back and view it objectively. Just view the voice as a vocalization mechanism that is capable of making it appear like someone is in there talking to you. Don’t think about it; just notice it. No matter what the voice is saying, it’s all the same. It doesn’t matter if it’s saying nice things or mean things, worldly things or spiritual things. It doesn’t matter because it’s still just a voice talking inside your head. In fact, the only way to get your distance from this voice is to stop differentiating what it’s saying. Stop feeling that one thing it says is you and the other thing it says it not you. If you’re hearing it talk, it’s obviously not you. You are the one who hears the voice. You are the one who notices that it’s talking.”
-Singer, The Untethered Soul
Practicing this consistently has done more to change my life than pretty much anything else.