I see Americans of every party, every background, every faith who believe that we are stronger together: black, white, Latino, Asian, Native American; young, old; gay, straight; men, women, folks with disabilities, all pledging allegiance under the same proud flag to this big, bold country that we love. That's what I see. That's the America I know!

I know that I am intelligent, because I know that I know nothing.

It is a mania shared by philosophers of all ages to deny what exists and to explain what does not exist.

Nearly every man who develops an idea works it up to the point where it looks impossible, and then he gets discouraged. That's not the place to become discouraged.

Well the protester I think is a very powerful thing. It's basically a mechanism of democracy that, along with capitalism, scientific innovation, those things have built the modern world. And it's wonderful that the new tools have empowered that protestor so that state secrets, bad developments are not hidden anymore.