Healing power accompanied the words which He spoke.

    On the way to Jerusalem he was passing along between Samaria and Galilee. And as he entered a village, he was met by ten lepers, who stood at a distance and lifted up their voices, saying, “Jesus, Master, have mercy on us.” When he saw them he said to them, “Go and show yourselves to the priests.” And as they went they were cleansed. —Luke 17:11-14 ESV

J.C. Ryle comments:

We are told that when the lepers cried to our Lord, He only replied, “Go show yourselves to the priests.” He did not touch them and command their disease to depart. He prescribed no medicine, no washing, no use of outward material means. Yet healing power accompanied the words which He spoke. Relief met the afflicted company as soon as they obeyed His command. “It came to pass that as they went they were cleansed.”

A fact like this is doubtless intended to teach us knowledge. It shows us the wisdom of simple, childlike obedience to every word which comes from the mouth of Christ. It does not become us to stand still, and reason, and doubt, when our Master’s commands are plain and unmistakable. If the lepers had acted in this way, they would never have been healed. We must read the Scriptures diligently. We must try to pray.