Hearts

From 1 Kings

Then Eli'jah said to all the people, "Come near to me"; and all the people came
near to him. 1 Kings 18:30

The lesson begins…

And he repaired the altar of the LORD that had been thrown down [by taking]
twelve stones, according to the number of the tribes of the sons of Jacob, to
whom the word of the LORD came, saying, "Israel shall be your name." And
he put the wood in order, and cut the bull in pieces and laid it on the wood.
And he said, "Fill four jars with water, and pour it on the burnt offering, and
on the wood." And he said, "Do it a second time"; and they did it a second time.
And he said, "Do it a third time"; and they did it a third time. And the water
ran round about the altar, and filled the trench also with water. 1 Kings 18:30-35

I am repairing you, Israel, who has been thrown down away from God. Despite the 12 jars of water you have thrown on your stone hearts, the Lord shall enflame them again.

Answer me, O LORD, answer me, that this people may know that thou, O LORD,
art God, and that thou hast turned their hearts back." Then the fire of the LORD
fell, and consumed the burnt offering, and the wood, and the stones, and the
dust, and licked up the water that was in the trench. And when all the people
saw it, they fell on their faces; and they said, "The LORD, he is God; the LORD,
he is God." 1 Kings 18:37-39