Christ had been in Galilee before, and in this town, and wrought a miracle, and if this courtier were a disciple of John, (as some think, but it is hard to prove), it is probable he had been at the passover, and seen the miracles he wrought there, or at least might have heard of them from some who were there. Though it was a good way from Capernaum thither, yet his love to his son carried him, and humbled him to beseech Christ that he would come down and heal his son; by which he showed a great weakness of faith, as if he thought that Christ could not put forth his healing virtue at a distance, but his personal presence was necessary; as Naaman the Syrian thought that Elisha must come down and lay his hand upon him. His son, it seems, was in human appearance dying.
Related Commentaries of John 4:47
John 4:47
47 When he heard that Jesus was come out of Judaea into Galilee, he went unto him, and besought him that he would come down, and heal his son: for he was at the point of death.