1, Elijah is to reveal the priesthood; 2–3, Promises of fathers are planted in hearts of children.

1 - Behold, I will reveal unto you the Priesthood, by the hand of Elijah the prophet, before the coming of the great and dreadful day of the Lord.

2 - And he shall plant in the hearts of the children the promises made to the fathers, and the hearts of the children shall turn to their fathers.

3 - If it were not so, the whole earth would be utterly wasted at his coming.