"As an architect it is very important that you distinguish between different realities. There's the reality of the drawing and the reality of the building. So one could say, or at least it is the common belief that architecture has to be built; I always denied that, because ultimately it is based on an idea. I don't ever need a building to verify my idea. Of course, what with a building is more its vanity and actual physical experience. But I anticipate; I wouldn't even build it if I could not anticipate how it would be."

Source: Source: www.onetvasia.com