People who make no noise are dangerous.
Silent people are dangerous; others are not so. [Fr., Les gens sans bruit sont dangereux; Il n'en est pas ainsi des autres.]
Summer, after all, is a time when wonderful things can happen to quiet people.
It's like all those quiet people, when they do lose their tempers they lose them with a vengeance.
it is an easy mistake to think that non-talkers are non-feelers.
Our culture is biased against quiet and reserved people, but introverts are responsible for some of humanity's greatest achievements.
She sounds like someone who spends a lot of time in libraries, which are the best sorts of people.
It is the quietest and meekest people who are often capable of the most sudden and unexpected violences for the reason that when their control does snap, it goes entirely. (Hercule Poirot)
Matthew, much to his own surprise, was enjoying himself. Like most quiet folks he liked talkative people when they were willing to do the talking themselves and did not expect him to keep up his end of it.