Catechism of the Catholic Church

After Elijah had learned mercy during his retreat at the Wadi Cherith, he teaches the widow of Zarephath to believe in The Word of God and confirms her faith by his urgent prayer: God brings the widow's child back to life. (696, 555) The sacrifice on Mount Carmel is a decisive test for the faith of the People of God. In response to Elijah's plea, "Answer me, O LORD, answer me," the Lord's fire consumes the holocaust, at the time of the evening oblation. The Eastern liturgies repeat Elijah's plea in the Eucharistic epiclesis. Finally, taking the desert road that leads to the place where the living and true God reveals himself to his people, Elijah, like Moses before him, hides "in a cleft of the rock" until the mysterious presence of God has passed by. But only on the mountain of the Transfiguration will Moses and Elijah behold the unveiled face of him whom they sought; "the light of the knowledge of the glory of God [shines] in the face of Christ," crucified and risen.