The scientist should treasure the riddles he can't solve, not explain them away at the outset.

Brazil has no future as a China with fewer people.

When we imagine our Universe to be just one out of a multitude of possible worlds we devalue this world, the one we see, the one we should be trying to explain.

In a world of democracies, the most deserving basis of national differences is that the different states of the world should represent a form of moral specialisation within humanity.

In my view, a political vision is not a grab-bag of discrete problems and solutions. It is the visionary anticipation of a direction.

Social solidarity must rest instead on the sole secure basis it can have: direct responsibility of people for one another. Such responsibility can be realized through the principle that every able-bodied adult holds a position within the caring economy - the part of the economy in which people care for one another - as well as within the production system.

The scientist should treasure the riddles he can't solve, not explain them away at the outset.