On this YouTube video, Unification Church president Michael Jenkins explains how Sun Myung Moon ordered his subordinates to have former president George H.W. Bush unwittingly participate in the Unification Church's "Holy Wine" ceremony. Jenkins' discussion of how they slipped the wine to the former president begins around the 2:30 point in the video. The Bush/Holy Wine episode was first reported in John Gorenfeld's book Bad Moon Rising. As I have mentioned, it is an excellent book (Quick note: for those of you who don't want to watch the entire seven-minute video, John Gorenfeld has an edited version on YouTube).
The meaning of the Holy Wine Ceremony: According to Moon's theology, those who participate in this ceremony become part of Moon's "blessed family," giving the recipient what Moonies believe is a pure, untainted "lineage." In Unification theology, "lineage" is a central concept. Moon believes that Adam and Eve were perfected beings whose lineage was corrupted by Eve's sexual seduction by Lucifer. Since the Fall, humanity's blood line has been corrupted. Moon believes that Jesus emerged to save humanity but failed because he was crucified before he could fulfill his mission to marry and produce perfect children. Moon believes that he is the second Messiah who will restore humanity to its uncorrupted state and create the kingdom of heaven on earth. Drinking the church-sanctioned wine is part of the process of becoming, in Jenkin's words, "engrafted into the lineage of Heaven" by separating from Satan's lineage and becoming one of Moon's "blessed families"--the "chosen people" that Jenkins mentions near the end of the video. As Moon himself claims, as a consequence of participating in the Holy Wine Ceremony, "[y]ou are going to be in ultimate infinite faith to God, to True Parents [Rev. Moon and his wife], grateful to them and obedient to their will."
All in all, it was quite a coup for Moon, especially since the Moonies were able to successfully violate Secret Service protocol. It also allows leaders of the Unification Church to tell church members that a former president is now supposedly obedient to Moon's will and how the ingestion of the wine supposedly caused Bush the Elder to subsequently give high praise to the Moon patriarch: