The problem is no longer getting people to express themselves, but providing little gaps of solitude and silence in which they might eventually find something to say. ... What a relief to have nothing to say, the right to say nothing, because only then is there a chance of framing the thing that might be worth saying.
Gilles Deleuze, 20th-century French philosopher. I might add the problem of getting people to shut up until they have something to say. Of getting everyone to shut up so the rest of us can think.