Like the United Nations, there is something inspirational about New York as a great melting pot of different cultures and traditions. And if this is the city that never sleeps, the United Nations works tirelessly, around the clock around the world.

Freedom is a timeless value. The United Nations Charter calls for encouraging respect for fundamental freedoms. The Universal Declaration of Human Rights mentions freedom more than twenty times. All countries have committed to protecting individual freedoms on paper - but in practice, too many break their pledge.

One of my earliest memories is walking up a muddy road into the mountains. It was raining. Behind me, my village was burning. When there was school, it was under a tree. Then the United Nations came. They fed me, my family, my community.

Countries with higher levels of gender equality have higher economic growth. Companies with more women on their boards have higher returns. Peace agreements that include women are more successful. Parliaments with more women take up a wider range of issues - including health, education, anti-discrimination, and child support.

Achieving gender equality requires the engagement of women and men, girls and boys. It is everyone's responsibility.

Equality for women is progress for all.

The Millennium Development Goals were a pledge to uphold the principles of human dignity, equality and equity, and free the world from extreme poverty. The MDGs, with eight goals and a set of measurable time-bound targets, established a blueprint for tackling the most pressing development challenges of our time.

Gender equality and women's empowerment have been a top priority for me from day one as Secretary-General. And I am committed to making sure that the U.N. leads by example.

Education promotes equality and lifts people out of poverty. It teaches children how to become good citizens. Education is not just for a privileged few, it is for everyone. It is a fundamental human right.

True security is based on people's welfare - on a thriving economy, on strong public health and education programmes, and on fundamental respect for our common humanity. Development, peace, disarmament, reconciliation and justice are not separate from security; they help to underpin it.

I treasure my meetings with individuals affected by autism - parents, children, teachers and friends. Their strength is inspiring. They deserve all possible opportunities for education, employment and integration.

Climate change does not respect border; it does not respect who you are - rich and poor, small and big. Therefore, this is what we call 'global challenges,' which require global solidarity.

Our work for human dignity is often lonely, and almost always an uphill climb. At times, our efforts are misunderstood, and we are mistaken for the enemy. There has been a clear erosion of respect for U.N. blue and our impartiality.

It is a sad but undeniable reality that people have died in the line of duty since the earliest days of the United Nations. The first was Ole Bakke, a Norwegian member of the United Nations guard detachment, shot and killed in Palestine in 1948. The toll since then has included colleagues at all levels.

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.

Building sustainable cities - and a sustainable future - will need open dialogue among all branches of national, regional and local government. And it will need the engagement of all stakeholders - including the private sector and civil society, and especially the poor and marginalized.

The clear and present danger of climate change means we cannot burn our way to prosperity. We already rely too heavily on fossil fuels. We need to find a new, sustainable path to the future we want. We need a clean industrial revolution.

Do not hide behind utopian logic which says that until we have the perfect security environment, nuclear disarmament cannot proceed. This is old-think. This is the mentality of the Cold War era. We must face the realities of the 21st century. The Conference on Disarmament can be a driving force for building a safer world and a better future.

We have reached a new milestone as a human family. With seven billion of us now inhabiting our planet, it is time to ask some fundamental questions. How can we provide a dignified life for ourselves and future generations while preserving and protecting the global commons - the atmosphere, the oceans and the ecosystems that support us?

One of the main lessons I have learned during my five years as Secretary-General is that broad partnerships are the key to solving broad challenges. When governments, the United Nations, businesses, philanthropies and civil society work hand-in-hand, we can achieve great things.

Throughout human history, in any great endeavour requiring the common effort of many nations and men and women everywhere, we have learned - it is only through seriousness of purpose and persistence that we ultimately carry the day. We might liken it to riding a bicycle. You stay upright and move forward so long as you keep up the momentum.

The U.N.'s impartiality allows it to negotiate and operate in some of the toughest places in the world. And time and again, studies have shown that U.N. peacekeeping is far more effective and done with far less money than what any government can do on its own.

Saving our planet, lifting people out of poverty, advancing economic growth... these are one and the same fight. We must connect the dots between climate change, water scarcity, energy shortages, global health, food security and women's empowerment. Solutions to one problem must be solutions for all.

Europe and Africa share proximity and history, ideas and ideals, trade and technology. You are tied together by the ebb and flow of people. Migration presents policy challenges - but also represents an opportunity to enhance human development, promote decent work, and strengthen collaboration.

The explosion in access to mobile phones and digital services means that people everywhere are contributing vast amounts of information to the global knowledge warehouse. Moreover, they are doing so for free, just by communicating, buying and selling goods and going about their daily lives.

We have a legal and moral obligation to rid our world of nuclear tests and nuclear weapons.

We have a legal and moral obligation to rid our world of nuclear tests and nuclear weapons. When we put an end to nuclear tests, we get closer to eliminating all nuclear weapons. A world free of nuclear weapons will be safer and more prosperous.

My U.N. five-point plan focuses on preventing proliferation, strengthening the legal regime, and ensuring nuclear safety and security - an effort that was given good momentum by the Nuclear Security Summit held in Seoul earlier this year. The world is over-armed, and peace is underfunded.

Terrorism is a significant threat to peace and security, prosperity and people.

Some might complain that nuclear disarmament is little more than a dream. But that ignores the very tangible benefits disarmament would bring for all humankind. Its success would strengthen international peace and security. It would free up vast and much-needed resources for social and economic development. It would advance the rule of law.

The burden for achieving disarmament cannot be borne by peace groups alone. Everybody, regardless of age, income, profession, gender or nationality, has a stake in this quest.

Nuclear disarmament and non-proliferation are not utopian ideals. They are critical to global peace and security.

Climate change, in some regions, has aggravated conflict over scarce land, and could well trigger large-scale migration in the decades ahead. And rising sea levels put at risk the very survival of all small island states. These and other implications for peace and security have implications for the United Nations itself.

I was profoundly moved to be the first United Nations Secretary-General to attend the Peace Memorial Ceremony in Hiroshima. I also visited Nagasaki. Sadly, we know the terrible humanitarian consequences from the use of even one weapon. As long as such weapons exist, so, too, will the risks of use and proliferation.

Nuclear power plants must be prepared to withstand everything from earthquakes to tsunamis, from fires to floods to acts of terrorism.

Climate change is destroying our path to sustainability. Ours is a world of looming challenges and increasingly limited resources. Sustainable development offers the best chance to adjust our course.

As I prepare for my second term as Secretary-General, I am thinking hard about how we can meet the expectations of the millions of people who see the U.N.'s blue flag as a banner of hope. We have to continue our life-saving work in peacekeeping, human rights, development and humanitarian relief.

Not many countries establish a prize for peace. The Seoul Peace Prize has its roots in the 1988 Summer Olympics when this country opened its doors to people and athletes from more than 160 countries. Korea did so in part because it believes in the power of sports for peace and development.

We are using resources as if we had two planets, not one. There can be no 'plan B' because there is no 'planet B.'

Grave security concerns can arise as a result of demographic trends, chronic poverty, economic inequality, environmental degradation, pandemic diseases, organized crime, repressive governance and other developments no state can control alone. Arms can't address such concerns.

This Earth is our only home. Together, we must protect and cherish it.

The possibility that terrorist groups could obtain weapons of mass destruction should not be dismissed as a fiction. This is a horrific threat the international community should take seriously. As long as these weapons exist, so, too, does the risk of their use - by accident or design.