“There are no boundaries in this struggle to the death. We cannot be indifferent to what happens anywhere in the world, for a victory by any country over imperialism is our victory; just as any country's defeat is a defeat for all of us.”

“At night, after the exhausting games of canasta, we would look out over the immense sea, full of white-flecked and green reflections, the two of us leaning side by side on the railing, each of us far away, flying in his own aircraft to the stratospheric regions of our own dreams. There we understood that our vocation, our true vocation, was to move for eternity along the roads and seas of the world. Always curious, looking into everything that came before our eyes, sniffing out each corner but only ever faintly - not setting down roots in any land or staying long enough to see the substratum of things; the outer limits would suffice.”

“Above all, always be capable of feeling deeply any injustice committed against anyone, anywhere in the world.”

“The stars drew light across the night sky in that little mountain village, and the silence and the cold made the darkness vanish away. It was - I don't know how to explain it - as if everything solid melted away into the ether, eliminating all individualtiy and absorbing us, rigid, into the immense darkness. Not a single cloud to lend perspective to the space blocked any portion of the starry sky.”

“After graduation, due to special circumstances and perhaps also to my character, I began to travel throughout America, and I became acquainted with all of it. Except for Haiti and Santo Domingo, I have visited, to some extent, all the other Latin American countries. Because of the circumstances in which I traveled, first as a student and later as a doctor, I came into close contact with poverty, hunger and disease; with the inability to treat a child because of lack of money; with the stupefaction provoked by the continual hunger and punishment, to the point that a father can accept the loss of a son as an unimportant accident, as occurs often in the downtrodden classes of our American homeland. And I began to realize at that time that there were things that were almost as important to me as becoming famous for making a significant contribution to medical science: I wanted to help those people.”

“When asked whether or not we are Marxists, our position is the same as that of a physicist, when asked if he is a “Newtonian” or of a biologist when asked if he is a “Pasteurian.”There are truths so evident, so much a part of the peoples’ knowledge, that it is now useless to debate them. One should be a “Marxist” with the same naturalness with which one is a “Newtonian” in physics or a “Pasteurian.” If new facts bring about new concepts, the latter will never take away that portion of truth possessed by those that have come before.Such is the case, for example, of “Einsteinian” relativity or of Planck’s quantum theory in relation to Newton’s discoveries. They take absolutely nothing away from the greatness of the learned Englishman. Thanks to Newton, physics was able to advance until it achieved new concepts of space. The learned Englishman was the necessary stepping-stone for that.Obviously, one can point to certain mistakes of Marx, as a thinker and as an investigator of the social doctrines and of the capitalist system in which he lived. We Latin Americans, for example, cannot agree with his interpretation of Bolivar, or with his and Engels’ analysis of the Mexicans, which accepted as fact certain theories of race or nationality that are unacceptable today.But the great men who discover brilliant truths live on despite their small faults and these faults serve only to show us they were human. That is to say, they were human beings who could make mistakes, even given the high level of consciousness achieved by these giants of human thought.This is why we recognize the essential truths of Marxism as part of humanity’s body of cultural and scientific knowledge. We accept it with the naturalness of something that requires no further argument.”

“Let the world change you and you can change the world”