Sometimes a pessimist is only an optimist with extra information.

An egocentric pessimist is a person who thinks he hasn't changed, but that other people are behaving worse than before.

Opinion is usually something which people have when they lack comprehensive information.

From a personal experience and the examination of literature, I feel that we cannot take for granted that a dialogue, without information and perhaps without understanding, is possible between any individuals or groups on all levels. So the prerequisite is information.

Your everyday supermarket now carries roughly 40,000 items - twice as many as a decade ago. There are so many products, so many brands and sub-species of those brands, that no consumer is safe from the bombardment of choice overload.
A huge variety of product offering doesn't aid consumers. It is insanity. From the vast array of athletic shoes to bagels to portable CD players to bottled water, there quickly becomes a point at which mega-choices, like mega-information, do not serve the consumer; they abuse him.

Optimism is denial for chumps with no life experience".
"What's pessimism?" I said.
"Religion without God.