As it turns out, what looks like science sometimes is not.

I have to be clear with myself and very conscious of what I am trying to say. Misunderstandings will always take place; it's unavoidable.

Science is based on the possibility of objectivity, on the possibility of different people checking out for themselves the observations made by others. Without that possibility, there is no empirical principle capable of deciding between different arguments and theories.

Measurements, observations, descriptions can only be considered scientific when they are independently confirmed by other people.

In Rio de Janeiro, every cop has to make a choice. He either turns dirty, keeps his mouth shut, or goes to war.

We make violent cops, we make violent criminals, and no wonder we have shootouts in slums all of the time.

As a filmmaker, I make the films that I love, that are in my heart. That's what I care about.