The Emperor: If you will not be turned, you will be destroyed!
[shoots Luke with Force lightning]
The Emperor: Young fool... Only now, at the end, do you understand...
[the Emperor shoots at Luke with more Force lighting]
The Emperor: Your feeble skills are no match for the power of the Dark Side.
[shoots Luke with another burst of Force lighting]
The Emperor: Now, you will pay the price for your lack of vision!
[shoots more Force lighting]