 The LDS Church teaches that Jesus Christ will return to the earth to prepare for ordinance and conversion work to be done for all people who have ever lived, as well as to prepare the Earth itself for the completion of its mission as a testing ground for human souls.According to the Doctrine and Covenants, which is considered scriptural canon in the Church, "[the Son of Man] now reigneth in the heavens and will reign till he descends on the earth … which time is nigh at hand … but the hour and the day no man knoweth, neither the angels in heaven, nor shall they know until he comes.