Albert Barnes' Notes on the Whole Bible - John 9:32
Since the world began - Neither Moses nor any of the prophets had ever done this. No instance of this kind is recorded in the Old Testament. As this was a miracle which had never been performed, the man argued justly that he who had done it must be from God. As Jesus did it not by surgical operations, but by clay, it showed that he had power of working miracles by any means. It may be also remarked that the restoration of sight to the blind by surgical operations was never performed until the... read more
The Pulpit Commentary - John 9:32-33
The man, having once begun, will not be stopped in his argument. Since the world began ( ἐκ τοῦ αἰῶνος does not elsewhere occur in the New Testament; we have ἀπ αἰῶνος three times, and ἀπὸ τῶν αἰῶνων ) it was never heard that any one opened the eyes of one born blind. There is no record of any cure of blindness in the Old Testament. The miracle stands forth with grand distinctness on the page of history. If such stories had been told, neither he nor the author of... read more