I have to obey him or I'll be left all alone. And then... And then I won't be able to figure out what this is all about. I won't be able to know his master plan.
15 seconds sound clip from the Donnie Darko movie soundboard.
You can hear this line at 01:41:14 in the Blu-ray version of the movie.
Quote context
[...]
- I flooded my school and I burned down that pervert's house.
- I only have a few days left before they catch me.
- Did Frank tell you to do these things?
- I have to obey him. He saved my life.
- Do you mean, God's master plan? Do you now believe in God?
- I have the power to build a time machine.
- How is that possible? How is time travel possible? Donnie?
- When is this going to happen?
[...]