For the liberal state to accommodate a diversity of beliefs while having few positive convictions is one of the more admirable achievements of civilization.

One side-effect of the so-called war on terror has been a crisis of liberalism. This is not only a question of alarmingly illiberal legislation, but a more general problem of how the liberal state deals with its anti-liberal enemies.

People do evil things because they are evil. Some people are evil in the way that some things are coloured indigo. They commit their evil deeds not to achieve some goal, but just because of the sort of people they are.

Rousseau ranks among the great educational theorists of the modern era, even if he was the last man to put in charge of a classroom. Young adults, he thought, should be allowed to develop their capabilities in their distinctive way.

I value my Catholic background very much. It taught me not to be afraid of rigorous thought, for one thing.

It is easy to see why a diversity of cultures should confront power with a problem. If culture is about plurality, power is about unity. How can it sell itself simultaneously to a whole range of life forms without being fatally diluted?

Theology, however implausible many of its truth claims, is one of the most ambitious theoretical arenas left in an increasingly specialized world