Your thoughts betray you, Father. I feel the good in you, the c...
Luke: Your thoughts betray you, Father. I feel the good in you, the conflict.
Darth Vader: There is no conflict.
Luke: You couldn't bring yourself to kill me before and I don't believe you'll destroy me now.
Darth Vader: You underestimate the power of the Dark Side. If you will not fight, then you will meet your destiny.