From Latin se (“oneself”). Seity is commonly defined as “that which is particular to oneself.”
"The Abstract Absolute Space is the causa causorum of everything that is, has been, and shall be.The Abstract Absolute Space is the causa causorum of everything that is, has been, and shall be.The profound and joyful space is certainly the incomprehensible “Seity,” which is the ineffable, mystical root of the seven cosmoses. It is the mysterious origin of all that we know as spirit, matter, universes, suns, worlds, etc.“That,” which is divine, the space of happiness, is the tremendous reality beyond the universe and gods.“That” has no dimension, yet indeed, it is what is, what always has been, and what always will be. It is the life that intensely palpitates within each atom and within each sun." —Samael Aun Weor, Cosmic Teachings of a Lama