President Gordon B Hinckley, The Marriage That Endures, April 1974 General Conference

Every man who truly loves a woman, and every woman who truly loves a man, hopes and dreams that their companionship will last forever. But marriage is a covenant sealed by authority. If that authority is of the state alone, it will endure only while the state has jurisdiction, and that jurisdiction ends with death. But add to the authority of the state the power of the endowment given by Him who overcame death, and that companionship will endure beyond life if the parties to the marriage live worthy of the promise.