I'm going to be strong and firm.
3 seconds sound clip from the Happy New Year, Charlie Brown! movie soundboard.
You can hear this line at 00:17:28.054 in the VHS version of the movie.
Quote context
[...]
- If you wanna be a winner at... musical chairs. Yeah!
- Come on, Charlie Brown. It's almost midnight. I'll pour you a root beer.
- I've decided next year, I'm going to be a changed person.
- Oh, be serious, Charlie Brown.
- I'm going to be strong and firm.
- Forget it, Charlie Brown. You'll always be wishy-washy.
- Why can't I change just a little bit? I've got it. I'll be wishy one day and washy the next.
- Charlie Brown, I have news for you. You will never...
- Ah-ha. I thought so. You see? It's filled with dog germs.
[...]