“Some people are sadly oblivious to the fact that knowing how to say something negative or sarcastic does not in any way equal knowing how to say something that is actually intelligent or useful.” - Mike E. Knezevich, Jr.

“People who say 'I'm not a pessimist, I'm a realist' are actually just negative people who think they are always right.” - Nick Kinsella

“For many, negative thinking is a habit, which over time, becomes an addiction... A lot of people suffer from this disease because negative thinking is addictive to each of the Big Three -- the mind, the body, and the emotions. If one doesn't get you, the others are waiting in the wings.” - Peter McWilliams

"The naysayer is the person who often offers criticism of ideas, or always provides reasons why something won't work.  The extreme naysayer rarely offers suggestions or alternatives, but is very good at picking holes in the ideas of others." - Robert Bacal (http://work911.com/articles/poslan.htm)