For as it says in the Good Book:
The two powerful warriors stand motionless for a few moments
with laser swords locked in mid-air, creating a low buzzing
sound.
VADER
Your powers are weak, old man.
BEN
You can't win, Darth. If you strike
me down, I shall become more powerful
than you can possibly imagine.
Their lightsabers continue to meet in combat.
INT. DEATH STAR - MAIN FORWARD BAY