Streets and their sidewalks-the main public places of a city-are its most vital organs.

Lowly, unpurposeful and random as they may appear, sidewalk contacts are the small change from which a city's wealth of public life may grow.

The trouble with paternalists is that they want to make impossibly profound changes, and they choose impossibly superficial means for doing so.

When we deal with cities we are dealing with life at its most complex and intense. Planners are guided by principles derived from the behaviour and appearance of suburbs, tuberculosis sanatoria, fairs and imaginary dream cities - from anything but cities themselves.

Modernism really started with people getting infatuated with the idea of "it's the twentieth century, is this suitable for the twentieth century." This happened before the First World War and it wasn't just the soldiers. You can see it happening if you read the Bloomsbury biographies. It was a reaction to a great extent against Victorianism. There was so much that was repressive and stuffy. Victorian buildings were associated with it, and they were regarded as very ugly. Even when they weren't ugly, people made them ugly. They were painted hideously.

Artists, whatever their medium, make selections from the abounding materials of life, and organize these selections into works that are under the control of the artist.... In relation to the inclusiveness and literally endless intricacy of life, art is arbitrary, symbolic and abstracted. That is its value and the source of its own kind of order and coherence.

By the end of the book, it is quite different than the way you thought it would be when you started the book - both in form and what it contains and what you think. Well, you tipped in a lot and you digested a lot - it wasn't pre-digested in your view. And it changed what you thought and how you see things.