It is a question of relativity. In order to understand it more clearly we must cleanse our minds of old ideas instilled into us by false education, b… - Gottfried de Purucker

These great sages or masters have never been discouraged in their work for humanity by the fact that the body of truths which at cyclical intervals they promulgate anew would have to undergo periods of degeneration. Directed by spiritual beings even greater than they, they do this sublime work and without intermission throughout the whirling cycles of time. (Chapter 22)

Our own globe earth, in fact is technically a "hell" because it is a relatively dense material sphere and the states of consciousness of the beings inhabiting it are relatively heavily involved in the webs of maya — illusion. For this reason H. P. Blavatsky in The Voice of the Silence speaks of "Men of Myalba" — Myalba being a Tibetan term used for one of the hells in the philosophy of Northern Buddhism, and Myalba is our earth. (Chapter 11)

Reincarnation comes under the more general doctrine of reimbodiment. It is the teaching that the human ego returns to earth at some future time after the change men call death... in order that the ego may learn new lessons on earth, in new times, in new environments; taking up again on this earth the old links of sympathy and of friendship, of hatred and dislike, which were apparently ruptured by the hand of death when the ego-soul left our spheres. (Chapter 2)