Duality causes inner and Universal division as it creates a you, a me, and them. Whenever this is the way life is viewed there will be separation regardless if there’s a higher or lower self.
An awakening to me is a shift from being caught up in an I Self world, to seeing what’s really going on beyond all the distractions of duality. The phrase higher self is often used to explain what being awake is, but attachment to self causes duality anyway its looked at. One must go beyond any thought of self to truly awaken because any thought of self whether higher or lower is a distraction that keeps one locked into the I Self distractions. These two selfs create duality; oneness (no thought of a self) is the only true state of being. I’m old enough to have seen the old cartoons where an angel and devil would pop up on someone’s shoulders when they were about to make a decision, to me regardless of which self won out it was still a decision made by self. A belief of a higher self as opposed to a lower one makes for a nice story, but it just creates more inner division within.
This form that has manifested for humans to experience life only does what it does because of the conditioning in place. If there is less of this conditioning to be fortunate enough to not be controlled by the I Self count your blessings, because most people (form) will die consumed by an I Self. It makes no difference whether it’s labeled higher or lower as self is self and until self is truly let go of, duality and not oneness will be the controlling energy of life. This duality causes inner and Universal division as it creates a you, a me, and them. Whenever this is the way life is viewed there will be separation regardless if there’s a higher or lower self.