John 3:9

"How is all this possible?" asked Nicodemus.

This led to an angry debate among the Jews. "How can this man," they argued, "give us his flesh to eat?"

Many therefore of His disciples, when they heard it, said, "This is hard to accept. Who can listen to such teaching?"

"How can this be," Mary replied, "seeing that I have no husband?"

He looked up and said, "I can see the people: I see them like trees--only walking."

"How is it possible," Nicodemus asked, "for a man to be born when he is old? Can he a second time enter his mother's womb and be born?"

Treasury of Scripture Knowledge

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

For it is always he who asks that receives, he who seeks that finds, and he who knocks that has the door opened to him.

"How then were your eyes opened?" they asked.