"The teachings, the sermons, the music, and the feelings and Spirit in this sacred building [the Salt Lake Tabernacle] transfer without being diminished to the great Conference Center nearby, where they are heard by tens of thousands, translated into dozens of languages, and sent to congregations across the world.
"Even more, that Spirit enters into the homes of millions upon millions of Latter?day Saints. In the homes, parents pray for the well-being of their children. Men and women and, as the Book of Mormon promised, even little children can receive the testimony of Jesus Christ (see Mosiah 24:22; Alma 32:23; 3 Nephi 17:25) and of the Restoration of His gospel. . . .
"It is not so much what is heard in the sermons but what is felt. The Holy Ghost can confirm to all who come within that influence that the messages are true, that this is The Church of Jesus Christ of Latter-day Saints."
Ref. (Boyd K. Packer, "The Spirit of the Tabernacle," Ensign, May 2007, 28)
Interesting questions with many theories posted in this Thread: What About The Holy Ghost's Body?. It is a few pages long so if you start from the beginning you will find that someone touched on all of those questions thus giving you the answers you may be looking for.