You exist in an infinite number of universes. You are massive. You are far more than you perceive yourself to be.
If you've read any of the Seth books you've heard him reference "probable selves" and "parallel selves." I have always been fascinated by this aspect of these books as it completely changes my concept of spirituality and awakening to my greater self.
Although I love this idea, I can see why it's slow to take root within us as common knoweldge. It asks for a complete overhaul of our concept of self. It asks us to tear down the idea of one body, one mind, one ego, one singular timeline. But I believe the deeper resistance to this is the fact that it once again knocks us off our pedestal as the center of something.
There seems to be few things humans fear more than realizing they aren't the most important beings in the Universe. Nevermind multiple universes, we could barely handle accepting Earth was not the center of the Universe. I do hope one day we can all realize parallel selves do not make us, as the individual entities we are in this universe, less important, but rather it makes who we are, who we really are, that much bigger and more fantastic.
Below is a quote from the Seth and Jane Roberts book Dreams and Projections of Consciousness. If you are not familiar with the work of Seth and Jane Roberts I suggest starting with the book The Nature of Personal Reality.
"There are many you’s in the probable systems, and each You is related psychologically in a personality structure.
The You that you know is a part of this. In your system, all the other You’s seem to exist in a probable reality.
To any of them, the others would seem to exist in a probable universe, yet all are connected. All of you did not have the same parents, for example, and there are portions of probable situations existing in your own parents’ separate lives. [To Rob:] In two probable realities, your mother did not have children. You do not exist in these. In some, she married but not the man you know as father. A psychological connection exists betwen that first son in that other system and yourself.
Emotional charged feeling immediately sets up what you may think of as a tangent. It is expressed in some reality system. This is the inner nature of action. Those thoughts and desires and impulses not made physically real in your terms will be made real in other systems.
Now, the inner self is psychologically influenced by these probable personalities, for they represent a whole personality structure or gestalt with which you are utterly unfamiliar. Your psychologists are dealing with a one-dimensional psychology, at their best.
In the dream state, the portions of the larger ‘structure’ sometimes communicate in highly codified symbols. It would be highly improbable that you could decipher many of these now. There is a feedback system that operates, and yet you must understand that these other identities are fully independent and individual. They exist in codified psychological structures within your personality, as you do in theirs.
They remain latent within you, and unexpressed in your system. You have their abilities, unused. You remain latent in their personality structures, and your main abilities are unused within their systems. Yet each of you is a part of one self in a multi-dimensional psychological structure.
These do not necessarily represent more evolved selves. Certain abilities will be more developed in them than in you, and vice versa. I am not speaking of portions of your self that exist in the ‘future.’ Each probable self, you see, has ‘future’ selves.
This multi-dimensional personality or identity is the psychological structure with which we will be concerned in many sessions. The term includes probable selves, reincarnated selves and selves more developed than the self that you know. These make up the basic identity of the whole self. All portions are independent."
- Seth/Jane Roberts, Dreams & The Projection of Consciousness.