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

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.

Three decades into this crisis, let us set our sights on achieving the “three zeros” zero new HIV infections, zero discrimination and zero AIDS-related deaths.

Today, we have more than 110,000 men and women deployed in conflict zones around the world. They come from nearly 120 countries … Thanks to their efforts, life-saving humanitarian assistance can be delivered and economic development can begin.

I strongly reject threats by any member state to destroy another or outrageous attempts to deny historical facts such as the Holocaust.

Nuclear disarmament is the only sane path to a safer world.

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.

Energy is the golden thread that connects economic growth, increased social equity, and an environment that allows the world to thrive.

To achieve a Green Revolution, African farmers, must have access to land and security of tenure. They also need access to markets, technology and improved infrastructure.

The basic building block of peace and security for all peoples is economic and social security, anchored in sustainable development. It is a key to all problems. Why? Because it allows us to address all the great issues-poverty, climate, environment and political stability-as parts of the whole.

As many micro-credit schemes across the world can testify, investment in women is the best investment for the future.

SUSTAINABLE PEACE IS POSSIBLE ONLY WITH WOMEN’S FULL PARTICIPATION, their perspectives, their leadership, their daily, equal presence wherever we seek to make and keep the peace.

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

Saving our planet requires you to be ambitious in what you aim, and, equally, in how hard you work to reach your goal.

I’m a total luddite when it comes to technology. Pretending I know how to use a computer is a challenge.

Sometimes our body is willing, but our mind is weak. Sometimes our mind is willing, but our body is weak. Do not be afraid. Strive to extend your capacity but do not be disappointed with yourself. What does not challenge us, cannot change us.

Some people are quick to challenge others but refuse to look in the mirror and challenge themselves.

She (a woman politician) will be challenging a system that is still wedded to militarism and that saves billions of dollars a year by underpaying women and using them as a reserve cheap labor supply

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

I am confident that we will meet whatever challenges the future may bring.

As a company grows, communication becomes its biggest challenge.

The present challenge to the photographer is to express inner significance through outward form.