What does John 9:8-12 mean?

8 The neighbours therefore, and they which before had seen him that he was blind, said, Is not this he that sat and begged? 9 Some said, This is he: others said, He is like him: but he said, I am he. 10 Therefore said they unto him, How were thine eyes opened? 11 He answered and said, A man that is called Jesus made clay, and anointed mine eyes, and said unto me, Go to the pool of Siloam, and wash: and I went and washed, and I received sight. 12 Then said they unto him, Where is he? He said, I know not. (John 9:8-12 KJV)

William Burkitt’s Commentary

The blind man, thus miraculously cured, returns with much joy to his neighbours and acquaintance, who confer with him about this matter; they inquire, Whether he was the person cured or not? Who was the person that cured him, and where that person was? he assures them, he was the very person that was blind, but now cured, and he that cured him was Jesus: that the means used was clay and spittle; but where the person was, or what was become of him, he knew not.

Learn thence, 1. That the miraculous cures of God work a sensible alteration in men, not only in their own apprehension, but in the judgments of others. This miracle shined forth among the neighbours, who having seen and observed the blind man, admire his healing.

Learn, 2. How frankly the blind man acknowledges, and how freely he confesses, that he was the person whom Jesus had healed; I am he. It is an unthankful silence to smother the works of God in an affected secrecy; to make God a loser by his bounty towards us, is a shameful injustice. O God! we are not worthy of thy common favours, much less of spiritual blessings, if we do not publish thy mercies on the housetop, and praise thee for them in the great congregation.