And he answered and told them,
Elijah truly comes first, and restores all things; and how it is written of the Son of man, that he must suffer many things, and be treated with contempt.
All Commentaries on Mark 9:12 Go To Mark 9
John Chrysostom
AD 407
Note the extreme accuracy of [the prophetic] expression. He does not say “He will restore the heart of the son to the father,” but “of the father to the son.” Gospel of St. Matthew, Homily