If you tremble with indignation at every injustice, then you are a comrade of mine.

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.

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

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.

It is important to emphasize that guerrilla warfare is a war of the masses, a war of the people. The guerrilla band is an armed nucleus, the fighting vanguard of the people. It draws its great force from the mass of the people themselves.

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.

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.

I could become very rich in Guatemala but by the low method of ratifying my title, opening a clinic, and specialising in allergies. To do that would be the most horrible betrayal of the two 'I's' struggling inside me: the socialist and the traveller.

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.

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