From the 1997 movie "Contact", directed by Robert Zemecki, adapted from the novel by Carl Sagan, starring, among others, Jodie Foster as "Ellie Arroway" and Matthew McConaughey as "Palmer Joss".
Ellie challenges Palmer to prove the existence of God, when he in turn asks her a question: Palmer Joss: Did you love your father? Ellie Arroway: What? Palmer Joss: Your dad. Did you love him? Ellie Arroway: Yes, very much. Palmer Joss: Prove it.