This may require a bit of an explanation. The Book of Mormon begins with the story of a family living in Jerusalem around 600 B.C. The patriarch of the family (Lehi, the guy holding the round ball thing there) is told in a vision to leave Jerusalem with his family and a few others before Jerusalem gets destroyed. So they're all out there in the wilderness and one morning Lehi comes out of his tent to find a round brass ball thing "of curious workmanship" that they call a "Liahona" and it's got little arrows in it and gives them messages about where to go and what to do. This particular painting is fairly well known amongst Mormons as it's the standard image used in Sunday School to illustrate Lehi and his family finding the Liahona. In recent years more than a few people have (half-)jokingly commented about how the Liahona might have been a time-travelling GPS unit.