Redundancy is expensive but indispensable.

You can neither lie to a neighbourhood park, nor reason with it. 'Artist's conceptions' and persuasive renderings can put pictures of life into proposed neighbourhood parks or park malls, and verbal rationalizations can conjure up users who ought to appreciate them, but in real life only diverse surroundings have the practical power of inducing a natural, continuing flow of life and use.

Neighborhoods built up all at once change little physically over the years as a rule...[Residents] regret that the neighborhood has changed. Yet the fact is, physically it has changed remarkably little. People's feelings about it, rather, have changed. The neighborhood shows a strange inability to update itself, enliven itself, repair itself, or to be sought after, out of choice, by a new generation. It is dead. Actually it was dead from birth, but nobody noticed this much until the corpse began to smell.

The point of cities is multiplicity of choice.

To seek "causes" of poverty in this way is to enter an intellectual dead end because poverty has no causes. Only prosperity has causes.

Empires want [cities] only to trade with the empire, which doesn't help them at all. It's just a way of exploiting them.

My mother used to say when we were children, 'When a boy gets a stick in his hand, his brains run out the other end of it.' Power is a stick in the hand, and I have never heard of anybody who wielded a very big stick of power whose brains did not run out the other end. As a nation, our brains are running out the other end of our power right now.