Thank you for your honest question. I will be happy to answer it for you. We believe that marriage was intended by God from the beginning to be an eternal institution. It was not meant to end at death. When God married Adam and Eve in the Garden of Eden, they were eternal beings. Death had not yet entered into the world for their marriage to end at death. They were married for eternity. Death came as a consequence of the Fall. However, the Atonement of Christ was performed to reverse the consequence of the Fall, and make mankind immortal again; therefore their marriage also should be restored to its former state—i.e. be made eternal—as God had always intended it to be. But in order for marriages to be eternal, they must be solemnized for eternity by the divine power of the priesthood, with the “keys of the kingdom” that the Lord promised to Peter: that whatsoever he should seal on earth should be sealed in heaven, and whatsoever he should loose on earth should be loosed in heaven. If you are married by the vicar or by the Catholic priest “until death do you part,” than that is how it will be. It will only last until death. After that you won’t be married any more. We believe that the early Christian church apostatized, and lost the authority of the priesthood, and with it the keys that the Lord promised to Peter, to “bind and loose on earth, and it would be bound and loosed in heaven”. The LDS Church is the only church on earth today that possesses those keys, and is able to solemnize marriages not only for time, but also for eternity, so that they will continue to be in force after the resurrection. This is performed in our temples, where couples are married by those who are given the keys of this authority so that their marriages endure not only for time, but for all eternity. I hope that that answers your question.
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