Optimism is the key.

- Will Champion

Optimism can be relearnt.

- Marian Keyes

Optimism is the opium of the people.

- Milan Kundera

Optimism is the foundation of courage.

- Nicholas M. Butler

Optimist: day dreamer more elegantly spelled.

- Mark Twain

Optimism is inevitably the last hope of the defeated.

- Albert Meltzer

Optimism is a kind of heart stimulant - the digitalis of failure.

- Elbert Hubbard

Optimism is the madness of insisting that all is well when we are miserable.

- Voltaire

Optimism doesn't wait on facts. It deals with prospects. Pessimism is a waste of time.

- Norman Cousins

Optimism means better than reality; pessimism means worse than reality. I'm a realist.

- Margaret Atwood

Optimism - the doctrine or belief that everything is beautiful, including what is ugly.

- Ambrose Bierce

Optimism is essential to achievement and it is also the foundation of courage and true progress.

- Nicholas M. Butler

Optimism is the faith that leads to achievement. Nothing can be done without hope and confidence.

- Helen Keller

Optimists are usually wrong. But all the great change in history, positive change, was done by optimists.

- Thomas Friedman

Optimism with some experience behind it is much more energizing than plain old experience with a certain degree of cynicism.

- Twyla Tharp

Optimism isn't funny unless you are laughing at the person, whereas extreme pessimism is extremely funny. It's exaggeration.

- Steve Toltz

Optimism is infectious, and opportunity irresistible. Progress follows progress. Someone, even government, just has to get it started.

- Gloria Macapagal Arroyo

Optimists - people who believe in Britain, who believe in democracy - they're the people I believe who will vote for us to leave and take back control.

- Michael Gove

Optimism is not inherently a superior way of viewing the world. Certainly doctors will say it might be better for one's physical health to be an optimist. But, morally speaking it may not be appropriate in certain circumstances.

- Todd Solondz

Optimistic people generally feel that good things will last a long time and will have a beneficial effect on everything they do. And they think that bad things are isolated: They won't last too long and won't affect other parts of life.

- Martin Seligman

Optimistic people play a disproportionate role in shaping our lives. Their decisions make a difference; they are inventors, entrepreneurs, political and military leaders - not average people. They got to where they are by seeking challenges and taking risks.

- Daniel Kahneman

Optimism is an expectation that good things are going to be plentiful. The wealthy generally have the sense that life will bring good rather than bad outcomes. That doesn't mean they believe that good things will be omnipresent, but that they will outnumber the not-so-good.

- Jean Chatzky