Helena P. Blavatsky
In 1875, Kuthumi and El Morya founded the Theosophical Society through H. P. Blavatsky, commissioning her to write Isis Unveiled and The Secret Doctrine.
The purpose of this activity was to reacquaint mankind with the wisdom of the ages that underlies all of the world’s religions, the inner teachings guarded in the mystery schools since the last days of Lemuria and Atlantis. This includes the doctrine of reincarnation as well as an understanding of the ascension as the goal of life sought knowingly or unknowingly by every son and daughter of God.
Sources
Jesus and Kuthumi, Prayer and Meditation, p. 223.