“The sphere, as we view it nowadays, is the existential space. It is the space that cannot be discussed by physicists, that mathematicians or geometrists cannot discuss. But the same applies to architects, civil servants or people that work for the land registry. Because they all work with images that describe a non-personal, abstract, geometric, mathematical space.Space that doesn’t know ‘I’. When I or an I enters such a space, space transforms itself into a sphere.”

Peter Sloterdijk, Professor of Philosophy and Media Theory at the Karlsruhe School of Design