I am constantly challenged by pessimists who insist that military solutions are the only way to go. This was true in the 1980s, and it is true today. You should know that I do not consider myself a pacifist; there are times, in my view, when military action may be necessary.

The effect of one good-hearted person is incalculable.

Peace consists, very largely, in the fact of desiring it with all one's soul. The inhabitants of my small country, Costa Rica, have realized those words by Erasmus. Mine is an unarmed people, whose children have never seen a fighter or a tank or a warship.

My country is a country of teachers. It is therefore a country of peace. We discuss our successes and failures in complete freedom. Because our country is a country of teachers, we closed the army camps, and our children go about with books under their arms, not with rifles on their shoulders. We believe in dialogue, in agreement, in reaching a consensus.

The most deadly disease truly is the failure of the heart.

Hope is the strongest driving force for a people. Hope which brings about change, which produces new realities, is what opens man's road to freedom.

The existence of nuclear weapons presents a clear and present danger to life on Earth.