Humans have certain properties and characteristics which are intrinsic to them, just as every other organism does. That's human nature.

One contribution scientists can and should make is to be clear and explicit about the limits of scientific understanding, a matter that is particularly important in societies where people are trained to defer to alleged experts.

If we choose, we can live in a world of comforting illusion.

Anything that you are achieving that undermines and threatens systems of power will meet with oppression. Systems of power don't say 'thank you.' What's important is not to focus all your efforts on the oppression, but to continue the constructive work.

How many educated Americans can even remember the names of the assassinated Jesuit intellectuals of El Salvador, or would know where to find a word they wrote? The answers are revealing, particularly when we draw the striking - and historically typical - contrast to the attitudes towards their counterparts in enemy domains.

Capitalism is a system in which the central institutions of society are, in principle, under autocratic control. Thus, a corporation or an industry is, if we were to think of it in political terms, fascist, that is, it has tight control at the top and strict obedience has to be established at every level. [...] Just as I'm opposed to political fascism, I am opposed to economic fascism. I think that until the major institutions of society are under the popular control of participants and communities, it's pointless to talk about democracy.

To speak truth to power is not a particularly honorable vocation. One should seek out an audience that matters - and furthermore (another important qualification), it should not be seen as an audience, but as a community of common concern in which one hopes to participate constructively.