Her words renewed my courage.

Curtains and carpets were renewed.

Have you renewed your prescription lately?

So there's the optimism.

So optimism changes subjective reality.

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

I had my driver's license renewed last month.

I had my licence renewed a week ago.

I had my driving licence renewed last month.

That very optimism is uniquely American.

Puffing and panting we continued to run with renewed vigor.

Medicins Sans Frontieres, that renewed our commitment to disaster relief,

And there are great moments of optimism.

You probably know, some of you, that cells are continually renewed.

My father chose not to disturb my optimism.

Instead, there was a litany of astonishing optimism.

But there's also a wonderful case for optimism.

Come on. Let's keep a little optimism here.

There is considerable optimism that the economy will improve.

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)

Certainly, nothing can give you more optimism than that.

But private optimism about our own personal future remains persistent.

Optimism leads to success in academia and sports and politics.

And maybe the most surprising benefit of optimism is health.

Optimism is sometimes characterized as a belief, an intellectual posture.

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

This is fascinating. You probably know, some of you, that cells are continually renewed.

And I therefore believe that optimism is what drives architecture forward.

And this hope, this optimism, endured a year of turbulent transition.

In fact, without the optimism bias, we would all be slightly depressed.

So they have adjusted the 2012 Olympic budget for the optimism bias.

Secondly, we need to aim off of the optimism of the generals.

no Remembrance from their Lord comes to them lately renewed, but they listen to it yet playing,

If we could do that, would we want to take people's optimism bias away?

So unrealistic optimism can lead to risky behavior, to financial collapse, to faulty planning.

Recently, Obama has introduced optimism at a sort of time of global financial crisis.

Here are the four things I came up with. The first is urgent optimism.

Could we alter people's optimism bias by interfering with the brain activity in these regions?

There was an energy there, an implacable optimism, a strange mixture of humility and daring.

In fact if you look at world history you can see some reasons for optimism.

So what we would really like to do, is we would like to protect ourselves from the dangers of optimism, but at the same time remain hopeful, benefiting from the many fruits of optimism.

Never comes (aught) to them of a renewed Message from their Lord, but they listen to it as in jest,

One, a renewed belief in the importance of community, and a very redefinition of what friend and neighbor really means.