Do we really loose all of our memories, once we reach 7th density

[unity100]

What is called memories in this context are events and states that pertain to this current universe. They are states of being in the current universe.

So they pertain to this particular episode of existence of infinity.

To move forward to the next octave, having to leave those behind seems to be a necessity. After all, while still being tied to the states and happenings in this octave, how can one move ahead in the next...

Additionally, since memories are states of existence that were the reality at a given point in the history of this particular universe in this particular octave, they will always be here in this universe in this particular octave. Going back in 'time' will allow the entity to observe this universe as how it 'was' back in this octave.

However, this universe is not in a state of 'was'. It always 'is'. It is a state inside infinity, a state of intelligent infinity. Like all the infinite states of intelligent infinity as we go forward, or backward.

Spiritual journey, the existence, is just a viewer whose viewpoint is limited moving through the states of infinity. We also call it 'time'.