Roughly French for "again you", deja vous is the experience of thinking that one has been oneself before, perhaps in a past life, or in this same one, but several days ago. Extremely self-aware people are often unable to avoid experiencing deja vous throughout every minute of their waking lives.
(Not to be confused with "deja vu", a common and easier-to-spell phrase in both English and French.)
When I got up this morning and washed my face, the reflection peering back at me in the mirror gave me a distrubing impression of deja vous. I cannot help but ask, will I still be me again tomorrow? And in the days and weeks after that?
Consider the story: a vengeful, jealous deity, bearing strong resemblance to many a bearded Viking god, has a half-human son (without the woman's permission) for the specific purpose of ultimately sacrificing him by means that are both excruciating and bloody.