It is better to see once than to hear a hundred times.

A New World Order is required to deal with the Climate Change crisis.

It is better to discuss things, to argue and engage in polemics than make perfidious plans of mutual destruction.

The forests of Russia and Brazil are the lungs of the Earth.

Sometimes when you stand face to face with someone, you cannot see his face.

The time has come to choose a new direction of global development, to opt for a new civilization.

You cannot go to sleep with one form of economic system and wake up the next morning with another.

It will be difficult, even painful, but democracy will prevail in Russia. There will be no dictatorship, although relapses into authoritarianism are possible.

Those who are late will be punished by life itself.

The market is not an invention of capitalism. It has existed for centuries. It is an invention of civilization.

We are all passengers aboard one ship, the Earth, and we must not allow it to be wrecked. There will be no second Noah's Ark.

If what you have done yesterday still looks big to you. You haven't done much today.

If not me, who? And if not now, when?

The threat of environmental crisis is the 'international disaster key' to unlock the New World Order.

Peace is not unity in similarity but unity in diversity, in the comparison and conciliation of differences.

Science brings men nearer to God.

Oh my goodness the mystery that has prompted my objective. My quality lies exclusively in my tirelessness.

Whatever your career may be, do not let yourselves become tainted by a deprecating and barren scepticism.

Do not let yourself be tainted with a barren skepticism.