John 3:9

"How can this be?" said Nicodemus in reply.

Then the Jews began to dispute among themselves, saying, "How can this man give us his flesh to eat?"

So many of his disciples, when they heard it, said: "This teaching is unbelievable! Who can listen to him?"

And Mary said to the angel. "How can this be? For I have no husband?"

The man looked up and said, "I can make out the people, for as they move about, I see them like trees."

"How can a man be born when he is old?" Nicodemus replied; "Can he enter a second time into his mother's womb, and be born?"

Treasury of Scripture Knowledge

Nicodemus answered and said unto him, How can these things be?

"For every one who asks receives, and he who seeks finds, and to him who knocks the door is opened.

So they asked him, "How then were your eyes opened?"