what is the "density" exactly means?

[Peregrinus]

Q'uo sessions which may be helpful.

http://www.llresearch.org/transcripts/is...6_0507.pdf

Concerning the basic setup of the transition, there is a moment of transition in terms of the planet itself. That moment of transition is at some point near to the winter solstice of 2012. It is fairly set—cut and dried, as this instrument would say.

The one known as Jim was saying that in The Ra Material, the period of transition was suggested to be perhaps between 100 and 700 of your years. The reason it is so approximated is that we do not know who shall inspire whom with love and with the daring to make courageous choices at difficult moments.

This part is important to your seeking:

Once third density winds down on planet Earth, it shall be inactive for a time. This is due to the need of new fourth-density entities to learn the ways of invisibility. There is no desire in fourth-density entities to disturb or surprise third-density entities. If fourth density were visible to third density, you would find yourself in a charming but very crowded universe made up of elementals, nature spirits and devas, totems, fictional entities who have gained inner-planes life because of the continued thoughts of many and so forth.

It would be an enchanting and diverse experience but it would be too much for you to bear. You are veiled from fourth density and all other densities that would give you these experiences because you are here in third density to discover who you are—that is, an ethical being—and to decide what you want to do with that troublesome consciousness that you have found.

Regarding the harmonic convergence:
http://www.llresearch.org/transcripts/is..._0927.aspx

The harvest has already begun. It began in your year 1987 in that period called “Harmonic Convergence”. Entities began being harvested when they died from the physical at that time. All were offered the steps of light. Many of those you now call “Indigo Children” are those who have graduated from Planet Earth in the positive sense, have now gone on to acquaint themselves with their new fourth-density homes and have asked for permission to return to third density as wanderers.