Art and activism can be symbiotic. They don't have to be, of course; they can also be contradictory.

I know that's a little jarring, coming from a Weatherman, but what I mean by being humble is doubting if your action did anything. So you have to open your eyes, act and doubt. And then you have to repeat for a lifetime.

Let's look at two things real quickly: the civil rights movement in Mississippi in the Sixties and the Arab Spring starting in Tunisia and Cairo. What they had in common was people who were told, and who believed inside themselves, that they were a certain way, and the society at large believed it.

If you read Martin Luther King speeches and sermons in the last two years of his life - you might want to - –when I read these to my students, they think it's Malcom X because it's so radical. And if you read nothing else - if your viewers read nothing else - then the April 4, 1967, speech at Riverside Church called "Beyond Vietnam," that's where he says the greatest purveyor of violence on earth is my country. And he connects the triplets of evil, racism, militarism, and materialism, and that connection makes him a radical.

I get up every morning and think, today I'm going to make a difference. Today I'm going to end capitalism. Today I'm going to make a revolution. I go to bed every night disappointed but I'm back to work tomorrow, and that's the only way you can do it.

Being an activist and an artist - those two things should go together. You should allow the artistic sensibility to control some of your activism, but never should it be allowed to paralyze you.

Art and activism can be symbiotic. They don't have to be, of course; they can also be contradictory.