By means of sacrifice, according to its underlying philosophy, man is able to transmit souls from this world to the world where dwell the gods and fairy-folk both good and evil. Thus, had Abraham sacrificed Isaac, the soul of Isaac would have been taken to heaven by Jehovah as fairies take souls to Fairyland through death. But the difference is that in human sacrifice men do voluntarily and for specific religious ends what various kinds of fairies or spirits would do without human intervention and often maliciously, as our review of ancient and modern theories of sacrifice has shown. Gods and fairies are spiritual beings; hence only the spiritual part of man can be delivered over to them. Melanesians and other peoples whose changeling beliefs have now been examined, regard all illness and death as the result of spirit interference; while Celts regard strange maladies in children and in adults as the result of fairy interference. And to no Celt is death in early life a natural thing: if it comes to a child or to a beautiful youth in any way whatsoever, the fairies have taken what they coveted. In all mythologies gods have always enjoyed the companionship of beautiful maidens, and goddesses the love of heroic youths; and they have often taken them to their world as the Tuatha De Danann took the great heroes of the ancient Celts to the Otherworld or Avalon, and as they still in the character of modern fairies abduct brides and young mothers, and bridegrooms or other attractive young men whom they wish to have with them in Fairyland (see our chapters iv-vi).