Albert Barnes Commentary John 9:26

"They said therefore unto him, What did he to thee? How opened he thine eyes?" — John 9:26 (ASV)

How opened he thine eyes? The reason why they asked this so often was doubtless to attempt to draw him into a contradiction: either to intimidate him, or throw him off his guard, so that he might be detected in denying what he had before affirmed. But God gave to this poor man grace and strength to make a bold confession of the truth, and sufficient common sense completely to confound his proud and subtle examiners.