How do you tell an optimist that he or she has lived a…

An optimist is someone who figures that if it walks like a duck and quacks like a duck, it's the bluebird of happiness.

— Robert Breault

People tell me, "You're such an optimist". Am I an optimist? An optimist says the glass is half full. A pessimist says the glass…

— Louis Zamperini

Creeds matter very little... The optimist proclaims that we live in the best of all possible worlds; and the pessimist fears this is true.…

— James Branch Cabell

You'll never find rainbows, If you're looking down...

— Charlie Chaplin

An optimist is merely an ex-pessimist with his pockets full of money, his digestion in good condition, and his wife in the country.

— Helen Rowland

It can be said of optimism that while sometimes mistaken, it is never sadly mistaken.

— Robert Breault

It's still possible to be a cockeyed optimist these days - you just have to be a little more cockeyed.

— Robert Breault

The realist sees reality as concrete. The optimist sees reality as clay.

— Robert Breault

After 5,000 years of recorded human history, you wonder, what part of 2,000,000 sunrises doesn't a pessimist understand?

— Robert Breault

A man he seems of cheerful yesterdays And confident tomorrows.

— William Wordsworth

We live in the best of all possible worlds

— Gottfried Leibniz

No pessimist ever discovered the secrets of the stars.

— Helen Keller

Some people argue against both optimism and pessimism in favor of so-called realistic thinking. They distrust optimism on the grounds that it causes us…

— Price Pritchett

I've always been sceptical about the notion that the market is a person you can engage in an argument with, and that that person…

— Joseph Stiglitz

The most common cause of low prices is pessimism - some times pervasive, some times specific to a company or industry. We want to…

— Warren Buffett