23. Jesus said unto him, If thou canst believe--The man had said, "If Thou canst do anything." Jesus replies.
      all things are possible to him that believeth--"My doing all depends on thy believing." To impress this still more, He redoubles upon the believing: "If thou canst believe, all things are possible to him that believeth." Thus the Lord helps the birth of faith in that struggling soul; and now, though with pain and sore travail, it comes to the birth, as TRENCH, borrowing from OLSHAUSEN, expresses it. Seeing the case stood still, waiting not upon the Lord's power but his own faith, the man becomes immediately conscious of conflicting principles, and rises into one of the noblest utterances on record.

JFB.