For the irony of all existence is that good would be totally impotent without the contrast of evil.
7 seconds sound clip from the The Flight of Dragons movie soundboard.
You can hear this line at 00:09:19.047 in the Blu-ray version of the movie.
Quote context
[...]
- Well, I'll go. It should prove amusing.
- But why does Antiquity force you to include something so abominable?
- As evil is a part of all things, evil is a part of our world of magic.
- For the irony of all existence is that good would be totally impotent without the contrast of evil.
- Ah? Whether does thou command me, Oh Master?
- Gorbash, for pity's sake, no formality please.
[...]