Matthew 8:13

Luke saith, And they that were sent, returning to the house, found the servant whole that had been sick, Luke 7:10; so as it seemeth that what Christ said unto the centurion, must be interpreted, to those whom the centurion sent in his name. Go your way, your business is done, the centurion's faith hath obtained, it shall be done to him as he hath believed; where believing must signify, a certain persuasion of the power of Christ, with a relying on this mercy and goodness. The proximate object of faith is some word of God. How far this centurion was acquainted with the oracles of the Old Testament (though he lived amongst the Jews, and, as appears by his building a synagogue for them, Luke 7:5, had a kindness for their religion) I cannot tell. It is most probable that he had some immediate revelation of God concerning Christ, which he is here said to have believed, and to have had a full persuasion of and trusted in. All revelations of God are the object of faith, though the Scriptures, being now written, are to us that have them the tests and touchstones to try such impressions by. As thou believest, not because thou believest. Our faith is not meritorious of the least mercies, built is an exercise of grace which gives glory to God, and receiveth the reward not of debt but of grace. The miracle appeared in that the disease was of an incurable nature, and the cure was wrought without application of means, and in such a moment of time as means, though used, could not have wrought it.