I wonder however, if there are people walking around with a positive voice in their head that supports and encourages them to be their best. I am not talking about someone with a narcissistic personality disorder, but rather a voice that is able to motivate positive activity, to push through, instead of give up. Would the outcomes in life by significantly different? What about the experience of life in general?

Indeed, it inner driving directions that guild and motivate either bad or good. I learned this some years back that nobody can motivate you than yourself. God already built this on us whenever we're down to driven our direction.