i lived with a bi polar man for a long time. he exhibited almost identical beliefs as you, and then some. he fancied himself god's favorite little messenger, like he somehow had the inside skinny on things that no one else did.
he was delusional. he adamantly denied it, got angry and beligerent about it, but in the end he finally sought help.
he no longer battles satan in the backyard. he no longer is shown the mysteries of the universe, and he no longer believes he was the chosen messenger of god to enlighten the world.
in other words, he has gotten the help he needs.