Done Quote by Craig Venter

Pessimists are usually right and optimists are usually wrong but all the great changes have been accomplished by optimists.

— Thomas Friedman

Optimists think that this is the best of all possible worlds; pessimists fear they are right.

— J. Robert Oppenheimer

Stick with the optimists. It's going to be tough enough even if they're right.

— Anonymous

Pessimists see a problem behind every opportunity. Optimists see an opportunity behind every problem.

— Denis Waitley

Optimists are right. So are pessimists. It's up to you to choose which you will be.

— Harvey Mackay

I am not an optimist, but a great believer of hope.

— Nelson Mandela

I am glad I am an optimist. The pessimist is half-licked before he starts. The optimist has won half the battle, the most important…

— Thomas Buckner

I've never been an optimist, but that's fine because pessimists have the possibility of being agreeably surprised.

— Roger Scruton

Optimists focus on the place they are going. Pessimists focus on the obstacles along the route. To become an optimist simply look ahead.

— Simon Sinek

The optimist thinks that this is the best of all possible worlds, and the pessimist knows it.

— J Robert Oppenheimer

In the long run the pessimist may be proved right, but the optimist has a better time on the trip.

— Anonymous

Pessimists calculate the odds. Optimists believe they can overcome them.

— Ted Koppel