Sometimes my internal monologue is the only thing that saves my ass when I feel like I'm in over my head.
I guess it's what the religious would call, an angel on your shoulder, for me it's called everything I've ever learned in life, If I did life right and remember the lessons I've learned, and if my recall is good, I won't make the same mistake.
Trusting in in yourself is just a hurdle, not a wall.
My inner voice is the Entire Album - Close To The Edge by YES, or Days of Future Passed by The Moody Blues...and alternate Thursdays Dark Side Of The Moon - Pink Floyd
I've always spent a fair amount of time talking to myself about various concerns, important decisions, and working through losses, etc. I've never felt the need to add mystique to it by calling it my Higher Self or something.
I gotta say though, there are so many things you can't think your way out of, I'm not sure it accomplished much sometimes aside from making certain I've done what I can to see things as they are and respond appropriately to them.
I figure it's okay to talk to yourself, so long as you don't answer
I call it my "higher self," although I used to assume it was "God." If we are our own gods, then this is correct.
The inner voice has saved my life outright several times, suddenly telling me to "get on the sidewalk NOW" and "get off the horse!" an instant before a disaster. It would tell me where the migrating warblers were in the woods, explain bird "flyways" to me, tell me exactly where to wait in the woods for the next flock to pass, and how many minutes until their arrival, etc.
My inner voice has more brains & smarts than I do most of the time!