When things are as they are now, one is better off with his mouth shut.

The key to happiness in life is knowing when to keep your mouth shut.

The author must keep his mouth shut when his work starts to speak.

Knowledge is power only as long as you keep your mouth shut.

“It’s a joy,” she said, “watching you keep your mouth shut.”

[N]ow keep your fuckin' mouth shut or I'll show you what it's like!

It's better to keep your mouth shut and appear stupid than open it and remove all doubt

"If you only ever read one book in your life I highly recommend... keeping your f***ing mouth shut." [sic]

The first thing a psychologist learns is to keep her mouth shut around laymen.

People can tell you to keep your mouth shut, but it doesn't stop you having your own opinions. Even if people are still very young, they shouldn't be prevented from saying what they think.

People can tell you to keep your mouth shut, but it doesn't stop you having your own opinion. Even if people are still very young, they shouldn't be prevented from saying what they think.

profanity and obscenity entitle people who don't want unpleasant information to close their ears and eyes to you.

If you only ever read one book in your life... I highly recommend you keep your mouth shut.

I kept my eyes and ears open and my mouth shut. That's what I learned growing up in South Philly. You want to get educated? You observe, but you don't say a word.