"There will be a competition for the memorial. And then it can be developed with trees, with planting. It can become a very beautiful place protected from the streets, because it is below. And it can be something very moving and very private."

"It's a project that touched me as an immigrant and as a New Yorker."

"Well, I didn't want to have the reminder sort of in the sky, so that people would forever look at it. I wanted to have - really to create a city from the bottom up. From that foundation, which held, from the democratic power of what the site really is."

"And you have to remember that I came to America as an immigrant. You know, on a ship, through the Statue of Liberty. And I saw that skyline, not just as a representation of steel and concrete and glass, but as really the substance of the American Dream."

"The foreign press seems obsessed with the Freedom Tower, as if it was the only thing going on here. In fact, we're trying to keep a huge juggling act in balance, with the tower as just one of the many balls in play."

"We will work with everybody for the good of New York."

"Well, I think one doesn't really have to invent this memorial space, because it is already there. And it is speaking with a voice and, you know, 4 million of us came to see the site."

"Larry wanted us to reposition the tower. We wouldn't, and won't. He's been holding back our fees. We want to get paid. And that's it. It'll get solved and we'll carry on with planning Ground Zero."

"Cities are the greatest creations of humanity."

"Winning a competition in architecture is a ticket to oblivion. It's just an idea. Ninety-nine per cent never get built."

"And it is very moving because one has to see the site not as just another site of development but it is a very special site. It is a site that souls and hearts of all Americans."

"To provide meaningful architecture is not to parody history but to articulate it."

"I'm not Candide, nor Dr Pangloss, but we know that faith moves mountains."

"And then, build a bustling wonderful city of the 21st century, with a restoration of a spectacular skyline, which Manhattan, of course, needs. So, that is really the design as a whole."

"I don't get to sleep when I'm in New York. Really. I'm living on adrenaline."

"Only through acknowledgment of the erasure and void of Jewish life can the history of Berlin and Europe have a human future."

"It's about how to bring together the seemingly contradictory aspects of the memorial, which is about a tragedy and how it changed the world, but also about creating a vital and beautiful city of the 21st century."

"It's a fantastic responsibility and a wonderful moment."

"I think there is a new awareness in this 21st century that design is as important to where and how we live as it is for museums, concert halls and civic buildings."

"I studied architecture in New York. So, really I was very moved, like everyone else, to try to contribute something that has that resonance and profundity of it means to all of us."

"Life it is not just a series of calculations and a sum total of statistics, it's about experience, it's about participation, it is something more complex and more interesting than what is obvious."

"The Spiral Gallery may happen, too. It is not dependent on government funding."