"This is the moment"

And he said"

People of the world - look at Berlin!

Look at Berlin, where Germans and Americans learned to work together and trust each other less than three years after facing each other on the field of battle.
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People of the world - look at Berlin, where a wall came down, a continent came together, and history proved that there is no challenge too great for a world that stands as one.
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But the burdens of global citizenship continue to bind us together. A change of leadership in Washington will not lift this burden. In this new century, Americans and Europeans alike will be required to do more - not less. Partnership and cooperation among nations is not a choice; it is the one way, the only way, to protect our common security and advance our common humanity.

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That is why the greatest danger of all is to allow new walls to divide us from one another.

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This is the moment when we must defeat terror and dry up the well of extremism that supports it.

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This is the moment when we must come together to save this planet. Let us resolve that we will not leave our children a world where the oceans rise and famine spreads and terrible storms devastate our lands. Let us resolve that all nations - including my own - will act with the same seriousness of purpose as has your nation, and reduce the carbon we send into our atmosphere. This is the moment to give our children back their future. This is the moment to stand as one.

{...} every language is spoken in our country; every culture has left its imprint on ours; every point of view is expressed in our public squares. What has always united us - what has always driven our people; what drew my father to America's shores - is a set of ideals that speak to aspirations shared by all people: that we can live free from fear and free from want; that we can speak our minds and assemble with whomever we choose and worship as we please.
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People of Berlin - and people of the world - the scale of our challenge is great. The road ahead will be long. But I come before you to say that we are heirs to a struggle for freedom. We are a people of improbable hope. With an eye toward the future, with resolve in our hearts, let us remember this history, and answer our destiny, and remake the world once again.

Barak Obama

Read the entire text of his historic speech here.