All life is problem solving.

We do not know: we can only guess.

A theory which is not refutable by any conceivable event is non-scientific.

The peculiar evil of silencing the expression of an opinion is that it is robbing the human race ... those who dissent from the opinion, still more than those who hold it.

-- John Stuart Mill

The public sphere is a social phenomenon just as elementary as action, the actor, the group, or the collective; but it eludes the conventional sociological concepts.

-- Jürgen Habermas

Democracy has to be born anew every generation, and education is its midwife.

-- John Dewey

Only by settling our differences with other members of the group can we actually understand the shortcomings of our own beliefs.

-- Lawrence Kohlberg

To love justice and equality, the people need no great virtue; it is enough that they love themselves.

-- Maximilien Robespierre

Democracy and socialism are means to an end, not the end itself.

-- Jawaharlal Nehru