Like many Eastern Orthodox and Catholics, the LDS Church teaches that the prayers of the righteous living may be of help to the dead, but the LDS Church takes this one step further with vicarious sacraments (called "ordinances" but with a sacramental theological meaning). The LDS Church preaches the necessity of baptism by water and the Holy Ghost (Baptism and Confirmation) for salvation. They teach that previously ignorant spirits who accept Christ in Spirit Prison may receive saving ordinances through vicarious Baptism and Confirmation of the living. This is drawn from 1st Corinthians 15, wherein the Apostle Paul is arguing against a group of Christians who are mistakenly denying the physical resurrection of the dead. Paul asks them in 1st Corinthians 15:29: