a still tongue makes a wise head
proverb It is much wiser to speak only when it is appropriate or after one has thought carefully about what one wants or needs to say. If I may offer some advice, you should try to refrain from discussing your personal affairs so openly and at such length. Remember, a still tongue makes a wise head. I try to teach all my pupils that still tongues make wise heads. I felt anger surging up in me after her caustic comments, but, thankfully, I remembered that a still tongue makes a wise head before I said anything I'd regret.
Farlex Dictionary of Idioms. © 2024 Farlex, Inc, all rights reserved.