We actually don't know.

We know what happened.

We know and trust our neighbours.

The terrorists know that, and so do we.

We don t know why, but the correlation is clear.

And we try to guess what they're doing from their behavior on the surface.

We do not know which of the two effects predominates.

We only know that most of us have heard them many times.

As we all know, there is a strong relationship between security and development.

at stake. We know our clear way forward, but we need your help.

We are grateful, but we know that we can take charge of our own destinies if we have the will to reform.

We suspect but do not know that consumption will increase.

We know from measurements that greenhouse gases are accumulating in Earth s atmosphere.

We do not know how much of the recent rise is caused by human activities.

We now know that it atrophies in a number of psychiatric disorders.

We face an analogous situation today.

Throughout history, between Japan and the DPRK and Korea, we know Japan very well.

Today, we have the means to eradicate them.

We don t know yet whether political contagion in the Middle East will spread to other countries.

But as we enshrine our human rights in a new Constitution, we know that our future cannot be determined in ink.

We know how to do this better, and it's time to do better.

We do not know what the People s Bank of China (PBOC, the central bank) is doing at the moment in the bond market.

To respond to the representative of Iran I took note of what the representative of the United States stated about the number of items we know that already.

We all have a stake in space security today.

We all know how, and why, the Commission was established and we all know exactly what it is supposed to do.

Today I'm going to take you on a voyage to some place so deep, so dark, so unexplored that we know less about it than we know about the dark side of the moon.

You know, I think people go into a restaurant, and somebody orders a steak, and we all know where steak comes from, and somebody orders a chicken, and we know what a chicken is, but when they're eating bluefin sushi, do they have any sense of the magnificent animal that they're consuming?

And we know this because when we study different language groups and associate them with their cultures, we see that different languages slow the flow of ideas between groups.

We know this from a 1986 article by my Berkeley colleague James Powell and his co author, none other than wait for it Ben Bernanke.

Moreover, we live in a world of diverse cultures, and we know very little about social engineering and how to build nations.

We never knew when we woke up each morning what would happen.

They became marine. We now know them today from the ice caps.

It hasn t been easy living without knowing who we are, and it became even more difficult to live this way as we watched our world crumble.

We now know that the larger species can live for more than 30 years without showing signs of aging (senescence) and still be capable of reproduction.

Our livestock also shall go with us. Not a hoof shall be left behind, for of it we must take to serve Yahweh our God and we don't know with what we must serve Yahweh, until we come there.

Our cattle also shall go with us there shall not an hoof be left behind for thereof must we take to serve the LORD our God and we know not with what we must serve the LORD, until we come thither.

Moreover, we know from experience elsewhere and now in China itself that as growth accelerates, political aspirations are aroused.

for he is our God. We are the people of his pasture, and the sheep in his care. Today, oh that you would hear his voice!

For he is our God and we are the people of his pasture, and the sheep of his hand. To day if ye will hear his voice,

We recall the series of resolutions adopted by the United Nations General Assembly, since its creation, through to the present day.

We know a lot about four forces. There must be a lot more, but those are at very, very small distances, and we haven't really interacted with them very much yet.

We'll never know if this stuff worked. Actually, I think the Federal Bureau of Investigation took it down for security purposes, sometime in the early 1900s.

In many areas, rampant unemployment dulls their ambition and undermines morale, and we know that civil conflict can have a particularly devastating effect on the young.

We know.

Even as we cope with today s challenge, however, we must look ahead.