But optimism foundered over the course of 2013, and frustration soared.

What optimism!

But, over the last year, the spirit of optimism that energized these developments has, sadly, gone missing.

The two of them shared the optimism of a nation that had triumphed over a depression and fascism.

Robert Wright on optimism

The optimism is premature.

Optimism therefore the strengths.

So there's the optimism.

I'm going to talk to you about optimism or more precisely, the optimism bias.

Over the decades, Europe has alternated between excessive optimism and bouts of Euro pessimism such as the current period.

The Realism of Global Optimism

But this optimism is misplaced.

History provides grounds for optimism.

My Government shares this optimism.

So optimism changes subjective reality.

Such experiences provide grounds for optimism.

Deflation discourages optimism about the future.

Optimism has given way to doubt.

There is little reason for optimism.

There is some cause for optimism.

Enthusiasm, optimism, independence, self reliance, impulsivity

Larry Brilliant makes the case for optimism

Unfortunately, history provides little cause for optimism.

But there are strong grounds for optimism.

But such optimism may not be warranted.

Those are just some causes for optimism.

Optimism must be tempered with caution, however.

And there are great moments of optimism.

But this optimism is tempered with caution because of some painful events that befell the Palestinians and overshadowed their nascent optimism.

Ok, but careful, because if you cross over to the dark side of that force, to unrealistic optimism, then, you venture on dangerous ground.

Life in Gaza has bled away my optimism.

Arab diplomats also show few signs of optimism.

The fifth source of optimism is slightly paradoxical.

Here again, history gives no cause for optimism.

It has see sawed between optimism and despair.

Instead, there was a litany of astonishing optimism.

But there's also a wonderful case for optimism.

But prospects for political reform do not inspire optimism.

After 38 years of conflict, Colombians optimism is striking.

You could see a cautious optimism in everyone's eyes.

The latest news does not justify too much optimism.

So all in all, optimism has lots of benefits.

Perhaps we should say the same thing about optimism.

However, undeterred due to my teenage optimism (Laughter) (Applause)

But now let's look at the case for optimism.