“He will send Elijah the prophet. … Elijah shall reveal the covenants to seal the hearts of the fathers to the children, and the children to the fathers … .
“In the days of Noah, God destroyed the world by a flood, and He has promised to destroy it by fire in the last days: but before it should take place, Elijah should first come and turn the hearts of the fathers to the children” ( Joseph Smith [manual], 311, 313).