The Celestis removed themselves from history and detached themselves from the physical plane of existence, making themselves ideas, and so harder to destroy (harder than a physical body tied down to the timeline).
They believed themselves gods and aloof from the Spiral Politic. Due to the nature of their existence, they required people to act on their behalf as well as think of them to exist. To do this they often appeared to lesser beings in the form of gods. (PROSE: The Book of the War)
Interactions with history Edit
Because their human slaves were alive in the City of the Saved, the Celestis knew that Mictlan would one day be destroyed. (PROSE: The Book of the War) After the Eighth Doctor put a Celestis Mark of Indenture on the Shift, it was kept in a zoo in Mictlan and lived through the fall of the Celestis under the Memeovore. (PROSE: The Book of the War)
This came to pass when their former agent, One, arranged for the Memeovore to devour Mictlan and be subsequently cut away from the rest of the Universe by the Doctor and a fleet of War TARDISes, when he learned that Mictlan could attract the vast Swimmers to this universe. As a result, the Celestis were virtually all destroyed. (PROSE: The Taking of Planet 5 (novel)|)
Behind the scenes Edit
Rassilon's plan for the Time Lords to survive the Ultimate Sanction at the end of the Last Great Time War by becoming "creatures of pure consciousness" resembles the actions taken by the CIA in becoming the Celestis. (TV: The End of Time)