Mormons believe in "a friendly universe", governed by a God whose aim it is to bring his children to immortality and eternal life. Mormons have a unique perspective on the nature of God, the origin of man, and the purpose of life. For instance, Mormons believe in a pre-mortal existence where people were literal spirit children of God, and that God presented a plan of salvation that would allow his children to progress and become more like him. The plan involved the spirits receiving bodies on earth and going through trials in order to learn, progress, and receive a "fulness of joy". The most important part of the plan involved Jesus, the eldest of God's children, coming to earth as the literal Son of God, to conquer sin and death so that God's other children could return. According to Mormons, every person who lives on earth will be resurrected, and nearly all of them will be received into various kingdoms of glory. To be accepted into the highest kingdom, a person must fully accept Christ through faith, repentance, and through ordinances such as baptism and the laying on of hands.