Discuss Lady Aban Ceaulosevic's answer to: What can you do to know that you seen a ghost or spirit?

Some ghosts are "apparitions," in that they appear in spirit where a person suffered a fatal trauma.  It is the worst moment of a person's life, cast off to spare the spirit that hideous memory.

Some ghosts are "visitations."  These are fully sentient spirits who have made the long and arduous journey back here to counsel a living descendant to straighten out their lives or pay the penalty.  Only the choicest spirits will be granted "visitation."

Some ghosts are angels, here to see that our lives unfold as they should.  One will never see any evidence of these benevolent spirits.  However, we can feel them.  There are 144 orders of Angels, each tasked and empowered to do God's will.

Some ghosts are demons, here to cause as much hatred and destruction as possible by negatively influencing one's thoughts.  They are fugitives from eternal justice and are being rounded up as we speak.  The end of the age will not occur until the last of these outlaws have been apprehended.  Just as law enforcement personnel have great difficulty apprehending violent gang members, so do Angels have great difficulty apprehending demons.  There are 13 orders of demons, and the only power they have is to mislead.  However they abuse it most expertly.

Finally, there are animal and plant spirits, but they so seldom interact with us that we need not discuss it in detail.

All that ever lived or lives now has a spirit.  All that have died have been judged by their peers and either accepted or rejected.  There is no worse fate for a spirit than to wander the cosmos.