Charles Spurgeon Commentary John 9:18-21

"The Jews therefore did not believe concerning him, that he had been blind, and had received his sight, until they called the parents of him that had received his sight, and asked them, saying, Is this your son, who ye say was born blind? How then doth he now see? His parents answered and said, We know that this is our son, and that he was born blind: but how he now seeth, we know not; or who opened his eyes, we know not: ask him; he is of age; he shall speak for himself." — John 9:18-21 (ASV)

But the Jews did not believe concerning him, that he had been blind, and received his sight, until they called the parents of him that had received his sight. And they asked them, saying, Is this your son, who ye say was born blind? how then doth he now see?

His parents answered them and said, We know that this is our son, and that he was born blind: But by what means he now seeth, we know not; or who hath opened his eyes, we know not: he is of age; ask him: he shall speak for himself.

These parents, though in humble life, were evidently, like their son, sharp and shrewd; so they referred the question to the one who knew how to answer it.

But the Jews did not believe concerning him, that he had been blind, and received his sight, until they called the parents of him that had received his sight. And they asked them, saying, Is this your son, who ye say was born blind? how then doth he now see?

His parents answered them and said, We know that this is our son, and that he was born blind: but by what means he now seeth, we know not; or who hath opened his eyes, we know not: he is of age; ask him: he shall speak for himself.

They were timid, but they were also shrewd enough to let their son speak for himself, as he was quite able to do.

But the Jews did not believe concerning him, that he had been blind, and received his sight, until they called the parents of him that had received his sight. And they asked them, saying, Is this your son, who ye say was born blind? how then doth he now see?

His parents answered them and said, We know that this is our son, and that he was born blind: but by what means he now seeth, we know not; or who hath opened his eyes, we know not: he is of age; ask him: he shall speak for himself.

They also were shrewd. They did not wish to get themselves into trouble, and therefore they said as little as they could, and referred the Pharisees to their son, who was quite able to answer them.