After Jesus healed a blind man on the Sabbath, the Pharisees questioned the man, and then questioned him again, and he wanted an explanation for the repeated questioning, asking if they wanted to become disciples of this unknown healer.
“Then they reviled him and said, ‘You are His disciple, but we are Moses’ disciples. We know that God spoke to Moses; as for this fellow, we do not know where He is from” (John 9:28-29).
Yet, all that they had to do was view the evidence of a genuine miraculous healing of blindness, which is what the blind man said next,
“The man answered and said to them, ‘Why, this is a marvelous thing, that you do not know where He is from; yet He has opened my eyes!’” (John 9:30).
That makes me laugh. The man may have been blind at one time, but his mind was always sharp. The Pharisees said they did not know where Jesus was from, but what He had done showed His origin.