Why herein is a marvellous thing - As if he had said, This is wonderful indeed! Is it possible that such persons as you are, whose business it is to distinguish good from evil, and who pretend to know a true from a false prophet, cannot decide in a case so plain? Has not the man opened my eyes? Is not the miracle known to all the town; and could any one do it who was not endued with the power of God?
A marvelous thing - This is wonderful and amazing.
Know not from whence he is - That you cannot perceive that he who has performed such a miracle must be from God.