Uncertainty Quotes Not to be absolutely certain is, I think, one of the essential things in rationality.     Bertrand Russell When one admits that nothing is certain one must, I think, also admit that some things are much more nearly certain than others.     Bertrand Russell I believe that uncertainty is really my spirit's way of whispering, "I'm in flux. I can't decide for you. Something is off-balance here."     Oprah Winfrey In these matters the only certainty is that nothing is certain.     Pliny the Elder The only thing that makes life possible is permanent, intolerable uncertainty; not knowing what comes next.     Ursula K. LeGuin Doubt is not a pleasant condition, but certainty is absurd.     Voltaire Previous Subject - Truth | Next Subject - Vices