Another perspective would have the lower self seen as a 'recollection' as opposed to a direct connection. The indirect approach allows the so called 'past/lower self' to be filtered through a series of 'understandings' which have already been met by the individual so that no confusions of the past are repeated, its a natural gaurd but by no means dissconnects one from its lineage but is instead a foundation feature.
One may refer to past/future self when considering oversouls etc, though understand that these concepts are but stepping stones toward an abstract connection that must be made. It may be more appropriate for others to think of the overself as a mirror image...one that moves a little faster then you do which has you compelled to follow its cheek, whilst the lower self is following yours. A casscading effort, how you reflect upon the mirror will depend on what is reflected upon its surface.
In light, in love, with gratitude and acceptance, we give thanks to all that is, the universe, our home, our joy
-To be 'One' requires 'Two' choices, to be free is to see 'three' ways beyond the horizon-
-Words are but symbolic platforms that hold meanings, meaning has a way of building mortal towers that fall upon immortal virtues-