Great power doesn't need knowledge.
2 seconds sound clip from the Helen of Troy (1956) movie soundboard.
You can hear this line at 00:22:12.833 in the Blu-ray version of the movie.
Quote context
[...]
- In any place but Sparta, one so fair would be a queen. In Troy, we'd make songs about you.
- King Menelaus would not permit that here.
- Because you'd make his queen look plain.
- Oh, she would be pained to hear you say that.
- She owns me. I'm her shadow. And I always thought I knew her.
- No, I don't believe anyone knows Queen Helen very well, including Helen.
- Great power doesn't need knowledge.
- Wait. I only ask these questions because I must go to the palace.
- I intend to be discreet, so prepare me.
- If Menelaus is deaf to my errand, I'll ask the queen for help.
- Oh, if you were old and ugly, maybe then she could help you. But you're not old, nor ugly.
[...]