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

[Ankh]

Ra states "At the 7th level or dimension, we shall. if our humble efforts are sufficient, become one with all, thus having no memory, no identity, no past or future, but existing in the all."
Isn't the purpose of experience, for source to know itself and what it can be?
What point does it then have, that all memory is lost when a being reaches 7th density and joins consciousness with all? Then source consciousness doesn't gain one experience.

On another occasion, Ra states: "We came to your peoples to give the Law of One. We wished to impress upon those who wished to learn of unity that in unity all paradoxes are resolved; all that is broken is healed: all that is forgotten is brought to light."

I don't know for some reason it makes me very sad, you don't get the memory of every being who made it to 7th density like i first thought, it's like aaall your eternal years before, that let to this, are just cut off. lost.

Can anybody shed light on this?  

In my understanding it says that in 7D we will become one with *all*. Maybe you are focusing too much on the "thus having no memory" part instead of what comes next, which is *existing in all*? Having memory means that something has happened and one is remembering it. Perhaps in 7D, which is the density of foreverness, there is only now, so all your memories become here and now. I don't think that you will loose any memory in 7D, they will just become in 3D terms unexplainable way "here and now". You will become them all, at once, in the now.