Half-idealism is the peritonitis of the soul.
6 seconds sound clip from the The Big Knife (1955) movie soundboard.
You can hear this line at 01:18:47 in the Blu-ray version of the movie.
Quote context
[...]
- He said that there are three kinds of men. First, the realist. Now, that's Coy.
- He's made his deal with the devil. He wouldn't be any different.
- Then there's the philistine, like Hoff, who couldn't be any different.
- But they are what they are. They have their own integrity, they're incorruptible.
- Then there's the third kind, the idealist. That was you.
- Half-idealism is the peritonitis of the soul.
- Go write your book. Make it scandalous.
- Wire me for money anytime you need it.
- Somebody has to complete the work he was born to do.
- Yes, but it's one of your best qualities.
- Peritonitis of the soul. Those are the words you use above ground.
[...]