Pythagoras, an initiate of the Orphic Mysteries, and the Transmigration of Souls.
“…Pythagoras was a Pelasgian from Samos who developed his doctrine of the Transmigration of Souls as the result of foreign travel. According to his biographer Porphyrius he went to Crete, the seat of the purest Orphic doctrine, for initiation by the Idaean Dactyls.
They ritually purified him with a thunderbolt, that is to say they made a pretense of killing him with either a meteoric stone or a neolithic axe popularly mistaken for a thunderbolt; after which he lay face-downwards on the sea shore all night covered with black lamb’s wool; then spent ‘three times nine hallowed days and nights in the Idaean Cave’; finally emerged for his initiation.
Presumably he then drank the customary Orphic cup of goat’s milk and honey at dawn (the drink of Cretan Zeus who had been born in that very cave) and was garlanded with white flowers. Porphyrius does not record exactly when all this took place…Pythagorus was reborn at the winter solstice festival as an incarnation of Zeus….and went through the usual mimetic transformation: bull, hawk, woman, lion, fish, serpent, etc.”
–Robert Graves, The White Goddess, pp. 282-3.