How does our perception of ourselves change?

[Nicholas]

So, I am wondering how our individual perception of ourselves as parts of the Creator changes as we progress through the densities?

I think the short and literal answer would be the efficient use of catalyst offered during our lifetimes. Our ability to reform and adapt our perception and behaviour in light of new information received during any incarnation, denotes how efficient we are processing said information. Wisdom gained through the process described (in conjunction with life reviews), and in the context of each density propels us to seek new information, hence the desire to live again, or progress.

So, does our perception of ourselves change as we progress back to the source?

Indeed. There is no progression without it! I believe you are speaking about identity here? This Ra quote from 16.22 has some relevance...

There is past, present, and future in third density. In an overview such as an entity may have, removed from the space/time continuum, it may be seen that in the cycle of completion there exists only the present. We, ourselves, seek to learn this understanding. At the seventh 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.

The bit I have bolded seems to me as the ultimate in letting go of "ourselves".  

I guess I'm wondering if I will remember all of this, or will it just blend itself in with all of my experiences in other lives?

30.4 Questioner: Is there any loss to the mind or spirit after this transition which we call death or any impairment of either because of the loss of this chemical body that we now have?
Ra: I am Ra. In your terms there is a great loss of mind complex due to the fact that much of the activity of a mental nature of which you are aware during the experience of this space/time continuum is as much of a surface illusion as is the chemical body complex.

In other terms nothing whatever of importance is lost; the character or, shall we say, pure distillation of emotions and biases or distortions and wisdoms, if you will, becoming obvious for the first time, shall we say; these pure emotions and wisdoms and bias/distortions being, for the most part, either ignored or underestimated during physical life experience.

More than that. What role does our Higher Self play?

37.6 Questioner: In that case, we’ll go ahead with the questions we have here continuing the last session. You said that each third-density entity has an higher self in the sixth density which is moving to the mind/body/spirit complex of the entity as needed. Does this higher self also evolve in growth through the densities beginning with the first density, and does each higher self have a corresponding higher self advanced in densities beyond it?
Ra: I am Ra. To simplify this concept is our intent. The higher self is a manifestation given to the late sixth-density mind/body/spirit complex as a gift from its future selfness. The mid-seventh density’s last action before turning towards the allness of the Creator and gaining spiritual mass is to give this resource to the sixth-density self, moving as you measure time in the stream of time.

This self, the mind/body/spirit complex of late sixth density, has then the honor/duty of using both the experiences of its total living bank or memory of experienced thoughts and actions, and using the resource of the mind/body/spirit complex totality left behind as a type of infinitely complex thought-form.

In this way you may see your self, your higher self or Oversoul, and your mind/body/spirit complex totality as three points in a circle. The only distinction is that of your time/space continuum. All are the same being.

So, at my own risk I would liken our Higher Self to a metaphysical "hand me down"