“Mr. Old: Is there no form under which this Monad is identified?
Mme. Blavatsky: No form at all. It has a form in your own consciousness, and everything else that sees it are forms, created by the consciousness.
Mr. B. Keightley: Can you say that your thought is anywhere? That is the analogy.
Mr. Old: No, but you can embody it.
Mme. Blavatsky: No, you cannot.
Mr. B. Keightley: If the thought or Manas is the Upadhi of the Devachanic entity, then you can’t say your thought is located anywhere.
Mme. Blavatsky: “Remembrance” will not express the thing. It is the recollection of your personality, the feeling of the ego, that you were the personal ego; and that is the Upadhi of Devachan. Because if you are Mr. Smith, Mr. Smith will be in Devachan as Mr. Smith and will have the little Smiths around him, if he loved them, and his Mrs. Smith and everything.
Therefore the Upadhi is the consciousness of this personality for the time being. After it leaves Devachan, it is no more Mr. Brown.
Mrs. Besant: But would Mr. Smith be visible to a higher intelligence?
Mme. Blavatsky: Why should a higher intelligence look at him, what is there to see in the consciousness of another personality? The higher intelligence has got something better to do. What do you mean, Mrs. Besant, by higher intelligence – a Deva, a god?
Mrs. Besant: Yes, in all those instances.
Mme. Blavatsky: We are not concerned with them. During the Devachanic period the personality becomes, for the time being, so to say, merged in the individuality.
It is immortal, for the time of the cycle of life and, so to say, the individuality plays the part of that personality that he or she was during the life period, and this is the Upadhi, this is the basis upon which the whole Devachanic experiences and thoughts of bliss go and act.
Mrs. Besant: Suppose we take it as a state of sleep. A bystander would see the person, but not the mind. Then if that body is gone, there is nothing left to see.
Mme. Blavatsky: Certainly that is what it is. It is consciousness, just that.”
H. P. Blavatsky
The Mark Of God: Understanding Your "I AM Presence" 