Don't you see? That's just how it has to be. It's the only way to break the spell.
10 seconds sound clip from the Shrek (2001) movie soundboard.
You can hear this line at 01:04:38 in the Blu-ray version of the movie.
Quote context
[...]
- Take a good look at me, Donkey.
- I mean, really, who could ever love a beast so hideous and ugly?
- Princess and ugly don't go together.
- That's why I can't stay here with Shrek.
- My only chance to live happily ever after is to marry my true love.
- Don't you see? That's just how it has to be. It's the only way to break the spell.
- You at least gotta tell Shrek the truth.
- No! You can't breathe a word. No one must ever know.
- What's the point of being able to talk if you gotta keep secrets?
- Promise you won't tell. Promise!
- All right, all right. I won't tell him. But you should.
[...]