http://earthweareone.com/our-model-of-t ... tire-time/
i think this is quite a good explanation of these concepts.
past self, future self, the entity which is in future space/time and time/space point, can look back to his earlier self.
its hard to say this looking back is only possible at 3d. or whether it is possible in every other density.
since totalities and smc totalities come to act as a higher resource for 4d entities and higher, it seems that the totality takes over the role of higher self.
i dont see the resource totality leaves as a memory bank - i dont think its just memory. it is probably the entire picture of the entity EXISTING in this octave - in the past. its not a memory of times past, but its a live picture. and what the entity can possibly be, also included in this.
the possibility of more harvesting from this octave after this octave ends.... may be possible. however it is also possible that the resource that is left is the entire picture of all the possibilities in this octave.
i dont think the 6d higher self 'provides spirit' to the 3d self. the spirit is there in 3d self, the 6d spirit is there with 6d self. they are different points in time.
the possibility of 6d self reincarnating as wanderer to his 3d self's world is interesting, however considering how the 6d higher self takes the resources from totality towards end of 6d, that may not be happening.
whether the early 6d entity can reincarnate as wanderer to his old 3d world while his 3d self is living there, is another good question.