open one's mouth

As the saying goes, better to remain silent and be thought a fool than to open one’s mouth and remove all doubt—same goes for military posturing.

To open one's mouth today in public or write something for public consumption, even on a small scale, is to invite scorn, hatred, speculations about one's character, motives, politics, and entire life.

He said, “It’s better to remain silent and be thought a fool than to open one’s mouth and remove all doubt.”

Abraham Lincoln said, “It is better to remain silent and be thought a fool than to open one’s mouth and remove all doubt.”

Many are already adept in that ancient talent of British diplomacy: the ability to open one's mouth and move one's lips to emit words which give the illusion, but only the illusion, of a reply.