"The only passion that guides me is for the truth... I look at everything from this point of view."

"Whenever death may surprise us, let it be welcome if our battle cry has reached even one receptive ear and another hand reaches out to take up our arms."

"Passion is needed for any great work, and for the revolution, passion and audacity are required in big doses."

"The true revolutionary is guided by a great feeling of love. It is impossible to think of a genuine revolutionary lacking this quality."

"I know you are here to kill me. Shoot, coward, you are only going to kill a man."

"Many will call me an adventurer - and that I am, only one of a different sort: one of those who risks his skin to prove his platitudes."

"Cruel leaders are replaced only to have new leaders turn cruel."

"I have a wish. It as a fear as well - that in my end will be my beginning."

"I would probably have more in common with a whale than with a bourgeois married couple employed at worthy institutions that I would wipe from the face of the earth if it was given to me to do so."

"How easy it is to govern when one follows a system of consulting the will of the people and one holds as the only norm all the actions which contribute to the well being of the people."

"Study hard so that you can master technology, which allows us to master nature."

"I am one of those people who believes that the solution to the world's problems is to be found behind the Iron Curtain."

"A political event was that I met Fidel Castro, the Cuban revolutionary. He is a young, intelligent guy, very sure of himself and extraordinarily audacious; I think we hit it off well."

"It is unnecessary to say that Fidel Castro possesses the high qualities of a fighter and statesman: our path, our struggle, and our triumph we owed to his vision."

"Better to die standing, than to live on your knees."

"Above all, try always to be able to feel deeply any injustice committed against any person in any part of the world. It is the most beautiful quality of a revolutionary."

"In a revolution, one triumphs or dies."

"One must endure without losing tenderness."

"The ***** is indolent and lazy, and spends his money on frivolities, whereas the European is forward-looking, organized and intelligent."

"And then many things became very clear... we learned perfectly that the life of a single human being is worth millions of times more than all the property of the richest man on earth."

"We are overcome by anguish at this illogical moment of humanity."

"The world must not only be interpreted, it must be transformed. Man ceases to be the slave and tool of his environment and converts himself into the architect of his own destiny."

"Remember that the revolution is what is important, and each one of us, alone, is worth nothing."

"I had a project for my life which involved 10 years of wandering, then some years of medical studies and, if any time was left, the great adventure of physics."