Except ye see signs ... - This was spoken not to the nobleman only, but to the Galileans generally. The Samaritans had believed without any miracle. The Galileans, he said, were less disposed to believe him than even they were; and though he had performed miracles enough to convince them, yet, unless they continually saw them, they would not believe.
Related Commentaries of John 4:48
John 4:48
48 Then said Jesus unto him,Except ye see signs and wonders, ye will not believe.