The vision of the second witness of the Father.

Joseph Smith once said that, "The Holy Ghost is yet a spiritual body and is waiting to take to himself a body, as the Savior did."[Joseph Smith, Encyclopedia of Joseph Smith's Teachings, edited by Larry E. Dahl and Donald Q. Cannon (Salt Lake City: Bookcraft, 1997)]

"The Holy Ghost is now in a state of probation which if he should perform in righteousness he may pass through the same or a similar course of things that the Son has." (Joseph Smith, The Words of Joseph Smith, p. 245; Sabbath address, Nauvoo, 27 August 1843. Reported by Franklin D. Richards.) 

Our probation started before our birth. Some think that this statement of Joseph's meant that the HG was already upon the earth. But I know through personal revelation that the Holy Ghost is upon the earth now and is one of the two witnesses who will die in Jerusalam where the holy of holies is now upon the earth and lay in the streets for three days then be resurrected for all to see. When these two sons of Levi have offered their lives as a sacrifice to God the priesthood will be taken off the earth with the reminant who have accepted the Holy Ghost as the witness of god that he is... Then will the words of John the Baptist be fulfilled when he stated in the name if messiah this priesthood will not be taken off the earth until the sons if Levi offer an offering in righteousness. He is thesecond witness of the Father and an apostle of the Father and the son.