Ellicott's Commentary for English Readers - John 9:33
(33) If this man were not of God.—His argument meets each of their assertions. His general assumption, admitted as a universal truth (John 9:31), had denied their assertion that this Man was a sinner. His conclusion now denies their assertion, “This Man is not of God” (John 9:16).He could do nothing—i.e., nothing of this kind, no miracle such as this, much less this miracle itself. read more
Ellicott's Commentary for English Readers - John 9:32
(32) Since the world began was it not heard.—Literally, from the world-age was it not heard. The phrase is a reminiscence of Isaiah 64:4. (Comp. also Note on Luke 1:70.)The eyes of one that was born blind.—This differentiates the miracle from the others in cases of blindness, and still more from all ordinary cures of maladies of the eyes. The man expresses what was simply true, that no science or skill had at that time been equal to the removal of blindness which had accompanied birth. That... read more