Esoteric Bookshelf

One of the books here describes the experiences of postmortem revivification.

"...the resulting 'un-dead' creature retains all the original memories and faculties, but it is no longer fueled by food or air. Instead, it is fueled by pure hatred, or in some cases, pure despair, avarice, or so on...

...as a consequence, the creatures tend to hunt down and destroy their former loved ones and terrorize everything they once knew."