Speaking your mind

Hugo Rifkind, commenting on a certain prime minister, makes a very good general observation:

I am always wary of people who say "I speak my mind," as though that was a good thing to begin with. It's a better strategy, surely, to think your mind, pick out some edited highlights, and speak those. Otherwise, what's the point of having a mind at all? You might as well just have your mouth wired up directly to somewhere else entirely.

Hugo Rifkind: The British Prime Minister's Gaffe-Prone Start - WSJ.com