Regret --Sindex

[Edited colors and made some small changes.]
Perhaps the greatest sin one can commit is regret.  The internal self-immolation of reliving painful memories in order to dwell on the pain and agony invites just the sort of creeping death one might imagine in their darkest dreams.  Setting root in the brain of the victim this slimy fiend gradually eats away at all of the healthy portion growing like a cancerous tumor until finally it removes itself, claiming the protective shelter of it's prey's skull.