Least said soonest mended

Most people talk too much because they wish to express their emotions. Humans are not governed by logic and calm, cold thinking; we tend to distrust those who seem to have too much of this trait. But learning when to shut up and move on can be a useful way of avoiding the "opening your mouth and putting your foot in it" scenario. "Look before you leap" and "Only fools rush in where angels fear to tread" are the watchwords to accompany this saying. Learn to walk away and leave your antagonist flabbergasted.