It is satisfactory, however, that the no less important philosophy of Pythagoras and Empedocles, and the Plantonists, take the contrary view, and declare the soul to be immortal; affirming, moreover, in a way which most nearly approaches (to our own doctrine), that the soul actually returns into bodies, although not the same bodies, and not even those of human beings invariably: thus Euphorbus is supposed to have passed into Phythagoras, and Homer into a peacock. They firmly pronounced the soul’s renewal to be in a body, (deeming it) more tolerable to change the quality (of the corporeal state) than to deny it wholly: they at least knocked at the door of truth, although they entered not. Thus the world, with all its errors, does not ignore the resurrection of the dead.
Tertullian
On the Resurrection of the Flesh
Chapter I