He's not sane enough to judge anything.
3 seconds sound clip from the Sleepless in Seattle movie soundboard.
You can hear this line at 01:01:27.261 in the Blu-ray version of the movie.
Quote context
[...]
- Jonah, it's good that your father's dating. It's just hard on you.
- It's something that you think you want, but then, when it actually happens, it scares you.
- Okay, now think. Shouldn't your father be the judge of whether someone is right or wrong for him?
- He's not sane enough to judge anything.
- Calm down, Jonah. Calm down.
[...]