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

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

The revolution is not an apple that falls when it is ripe. You have to make it fall.

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.

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.