Read them all here. For example, here's the one by George Lucas:
"Did you ever wonder who your father was, Frodo?"
"Uncle Bilbo was my father, Obi Gan Dalf."
"Your Uncle is a fine man, but he is not your father. Your father was a fine warrior and a great captain, strong in the Force. He was called Sarumann the Wise, and he was a good friend."
"Was? Is he dead?"
"He is no more. It is your destiny to avenge his death, young Baggins."