The distance between Capernaum and Cana is over twenty miles, yet by the exercise of His will, Jesus healed the dying boy by His word alone. The nobleman may have expected his son to recover gradually and progressively, but the cure was immediate and complete. The Gospels show that Jesus had no set formula for performing His miracles except to glorify the Father by them, yet His miracles were not done haphazardly. He sometimes commanded the sick to be brought to Him, but at other times, He healed without seeing them. He could heal by either word or touch. Sometimes He asked probing questions, but occasionally, He would act without discussion. In these many different scenarios, we can learn a variety of lessons.
The nobleman's grief contained a bud of faith, but he revealed its limits when he mentally limited the Christ's power to His immediate presence. The desperate father had just enough faith to believe that wherever Jesus was present, disease could be cured. So, fearing the loss of his son, he implored Jesus, "Sir, come down before my child dies!" (verse 49). He did not realize and understand that He could heal just as easily from a distance as on the spot. Jesus' observation, "Unless you people see signs and wonders, you will by no means believe" (verse 48), is thus a mild rebuke. The nobleman fell short of truly believing the assurance of Psalm 107:20: "He sent His word and healed them, and delivered them from their destructions."
Martin G. Collins
The Miracles of Jesus Christ: Healing a Nobleman's Son