Sealing is an ordinance (ritual) performed in Latter Day Saint temples by a person holding the sealing authority. The purpose of this ordinance is to seal familial relationships, making possible the existence of family relationships throughout eternity. Sealings are typically performed as marriages or as sealing of children to parents. They were performed prior to the death of Joseph Smith (the founder of the Latter Day Saint movement), and are currently performed in the largest of the faiths that came from the movement, The Church of Jesus Christ of Latter-day Saints (LDS Church). LDS Church teachings place great importance on the specific authority required to perform these sealings. Church doctrine teaches that this authority, called the priesthood, corresponds to that given to Saint Peter in .
Sealings
Faithful Latter Day Saints believe civil marriages are dissolved at death, but that a couple who has been sealed in a temple will be married beyond physical death and the resurrection if they remain faithful. This means that in the afterlife they and their family will be together forever. An illustrative difference in the marriage ceremony performed in the LDS Church's temples is the replacement of the words "until death do us part" with "for time and all eternity".
The LDS Church recognizes other monogamous, heterosexual marriages, both civil and religious, although they believe that such marriages will not continue after death because eternal marriages must be performed by priesthood authority. Eternal marriages are also performed vicariously for the deceased, of effect after receiving all other saving ordinances. As with sealings of living persons, they are sealed with their spouse and their children.
Couples who have children born to them before being sealed may have their children sealed to them afterwards. Couples who have children after being sealed need not have their children sealed to them in a separate ceremony. Children born to sealed parents are born in the covenant and are automatically sealed to their parents. Adopted children may be sealed to their adoptive parents once the adoption has been legally finalized.
The union of a sealed couple is regarded as valid only if both individuals have kept their religious covenants and followed Christ's teachings. Just as deceased individuals may refuse any temple ordinance (such as a sealing) done by proxy on their behalf, couples, parents, and children who were sealed to each other in life may refuse to accept a sealing of which they were a part. No one will be sealed to any one with whom they do not want to be sealed.
Only worthy members of the LDS Church, who hold current valid temple recommends, can attend and witness sealings. Non-member family and friends generally wait in the temple waiting room during the sealing ceremony.
Since the LDS Church rejects same-sex marriages, these unions are not performed in temples and are not recognized by the church.
Ceremony and vows
A temple sealing for a living couple has the man and woman kneel on opposite sides of an altar in a temple sealing room while wearing ceremonial temple robes. They grasp each other's right hand while facing double mirrors that create an infinite reflection. The male sealer then reads the following vows to groom (and then repeats the same vows with the changes noted in parentheses) to which they are to respond "yes".
Brother _[last name]_, do you take Sister _[last name]_ by the right hand and receive her unto yourself to be your lawfully wedded wife (give yourself to him to be his lawfully wedded wife, and receive him to be your lawfully wedded husband), for time and all eternity, with a covenant and promise that you will observe and keep all the laws, rites, and ordinances pertaining to this holy order of matrimony in the new and everlasting covenant; and this you do in the presence of God, angels, and these witnesses of your own free will and choice?
They are then pronounced husband and wife and promised blessings.
Civil recognition
Not all countries recognize marriages performed by clergy outside of the state religion. In these cases, temple marriages are not seen as legally binding, and a civil marriage must also be performed. In other cases, marriages must be performed in a public forum for any to witness or formally object. In such circumstances, government representatives or authorized clergy will perform the civilly-recognized public wedding prior to the temple sealing.