“Our atmosphere can’t tell the difference between emissions from an Asian factory, the exhaust from a North American SUV, or deforestation in South America or Africa.”

Nuclear terrorism is one of the most serious threats of our time. Even one such attack could inflict mass casualties and create immense suffering and unwanted change in the world forever. This prospect should compel all of us to act to prevent such a catastrophe.

We must turn the greatest collective challenge facing humankind today – climate change – into the greatest opportunity for common progress towards a sustainable future.

Nothing is more shameful than attacking sleeping children.

It is but a short step from hunger to starvation, from disease to death.

Sustainable development is the pathway to the future we want for all. It offers a framework to generate economic growth, achieve social justice, exercise environmental stewardship and strengthen governance.

We hold the future in our hands, together, we must ensure that our grandchildren will not have to ask why we failed to do the right thing, and let them suffer the consequences.

National boundaries these days are not that important because of transformative technological development. Now we are talking about the fourth industrial revolution.

Climate change…is, simply, the greatest collective challenge we face as a human family.

We have all heard of the web of life. The way we live threatens to trap us in a web of death.

You have to take ownership and leadership of tomorrow. For that to be possible, you have to strengthen your capacity and widen your vision as a global citizen.

The future of any leader or political systems is to be determined by the people of the country.

To measure the success of our societies, we should examine how well those with different abilities, including persons with autism, are integrated as full and valued members.

This is the moral challenge of our generation. Not only are the eyes of the world upon us. More important, succeeding generations depend on us. We cannot rob our children of their future.

The current model is global suicide. We need a revolution. Revolutionary thinking. Revolutionary action. Natural resources are becoming more and more scarce.

Since [violence against women] is rooted in discrimination, impunity and complacency, we need to change attitudes and behavior – and we need to change laws and make sure they are enforced just like you are doing in Cuba.

Let us take advantage of the opportunities presented by climate action and lay the foundations for a more prosperous and secure future for all.

We obviously have to honor the commitments that have been made to the people who are already retired or near the retirement age. But we need to tell the truth about the fact that when we set the retirement age at age 65 in America, life expectancy was only 62.

It is so great to sleep in safe, glorious, beautiful America. I just cannot get over it.

Somewhere along the way America became a giant mall with a country attached.

From what we’ve heard about George W., he has a lot issues that he wants to run on. They’re positive. They’re good. He thinks he’s got a good vision for America.

. . . learning never ends, and as we enter the next century, it will be more and more important for all Americans to be lifelong learners. . . . every one of us can contribute in some way to a better-educated America.

The citizens of America expect more. They deserve and they want more than a recital of problems.

If America was trying to keep the bubonic plague out of its hemisphere, Canadians would import it just to show their independence of American foreign policy.

But this is the great danger America faces. That we will cease to be one nation and become instead a collection of interest groups: city against suburb, region against region, individual against individual. Each seeking to satisfy private wants.