I could have been the greatest opera singer in the world.
4 seconds sound clip from the The Comedy of Terrors movie soundboard.
You can hear this line at 00:05:58 in the Blu-ray version of the movie.
Quote context
[...]
- Huh? What? Huh? I gave the sugar to you once. There!
- Shall I give him some medicine?
- Merely for purposes of enlightenment.
- I could have been the greatest opera singer in the world.
- What know you of art and beauty? Tosspot, soak, inebriate!
- Anybody could be proud to rest in this coffin.
[...]