The principal thing in Eleusis was not metempsychosis but birth as a more than individual phenomenon, through which the individual's mortality was perpetually counterbalanced, death suspended, and the continuance of the living assured.
Kerenyi argues that the Eleusinian mysteries centered not on personal soul-survival but on a transpersonal mythologem of perpetual renewal, aligning the rites with the archetype of birth beyond individual death.
, Essays on a Science of Mythology: The Myth of the Divine Child and the Mysteries of Eleusis, 1949thesis