[refreshed]

"...they are not strangers, but from the ranks of our kindred, friends, and fellow-beings and fellow servants...Our fathers and mothers, brothers, sisters and friends who have passed away from this earth...may have a mission given them to visit their relatives and friends upon the earth again..."

In contrast to what the Bible has to say:

Hebrews 13:2 Be not forgetful to entertain strangers: for thereby some have entertained angels unawares.

[Colofornian]

And this is one of the roots of Mormonism's problems...they believe that all "good angelic spirits" are in effect "ghosts" -- people who have lived on earth...

When you reduce angels to ghosts, you've got necromancy issues from the theological jumpstart!