Ambrose of Milan : Moreover, if anyone has not been baptized, let him be converted all the more securely by receiving the remission of his sins, [so that baptism] as a kind of fire may consume his sins, because Christ baptizes in fire and spirit. Hence, you read of this type in the books of Kings, where Elijah placed wood upon the altar and told them to pour water on it from urns. "And he said, 'Do the same the second time.' And they did it the second time. And he said, 'Do the same also the third time,' " and when the water dripped about, Elijah prayed, and fire descended from heaven. You, O mortal, are on an altar, you who are purified by water and whose sin is burned out that life may be renewed; for fire consumes wood and stubble. Do not fear the fire through which you are enlightened. Therefore it is said to you, "Come to him to be enlightened." Take up the yoke of Christ; do not fear because it is a yoke; hasten because it is light. It does not bruise the neck but adorns it. Why do you hesitate, why do you delay? It does not bind the neck with chains but unites the mind by grace. — On Elijah and Fasting, Chapter 22, 83 Origen of Alexandria : And what is the source of your belief that Elijah who is to come will baptize? Did he not even baptize the wood on the altar in the times of Ahab, when it required a bath that it might be burned up when the Lord appeared in fire? He commanded the priests to do this, and not only once, for he says, "Do it a second time, when also they did it a second time," and "Do it a third time, when also they did it a third time." How, then, will he who did not himself baptize at that time, but gave the task to others, baptize when he has come in fulfillment of the things said by Malachi? Christ, therefore, does not baptize in water, but his disciples. He reserves for himself the act of baptizing with the Holy Spirit and fire. — COMMENTARY ON THE GOSPEL OF John 6.125