God sends me important lessons when my life most calls for them.

From the Wookipedia's Palpatine archive:

Emperor: "You want this, don't you? The hate is swelling in you now. Take your Jedi weapon. Use it. I am unarmed. Strike me down with it! Give into your anger! With each passing moment, you make yourself more my servant."

Luke: "No."

Emperor: "It is unavoidable. It is your destiny. You, like your father, are now...mine."