For love is strong as death, jealousy is cruel as the netherworld; her coals are coals of fire, of the licking flame of G-d. Vast waters cannot quench love, nor can floods drown it; if a man were to give all his earthly possessions for love, he would be utterly scorned.
Song of Songs, 8:6-7
For everything hidden must be revealed, each secret longs to be disclosed, each love yearns to be betrayed, everything sacred must be desecrated. Heaven and earth conspire that all good beginnings should come to a bad end.
—from The Mirror by Isaac Bashevis Singer

Jewish Vampirology