Blue has no dimensions, it is beyond dimensions, whereas the other colours are not. They are pre-psychological expanses, red, for example, presupposi… - Yves Klein

Through all these researches into an art that would lead to immaterialisation, Werner Ruhnau [German architect] and I came together in the architecture of the air. He was hindered by the last obstacle that even a w:Mies van der Rohe [also a German architect, famous for his reflecting glass skyscrapers in the U.S.] hadn’t been able to overcome: the roof, the screen that separates us from the sky, from the blue sky. And I was hindered by the screen that the tangible blue on the canvas constitutes, which deprives man of a constant vision of the horizon.

At present, I am particularly excited by 'bad taste'. I have the deep feeling that there exists in the very essence of bad taste a power capable of creating those things situated far beyond what is traditionally termed 'The Work of Art'. I wish to play with human feeling, with its 'morbidity' in a cold and ferocious manner. Only very recently I have become a sort of gravedigger of art (oddly enough, I am using the very terms of my enemies). Some of my latest works have been coffins and tombs. During the same time I succeeded in painting with fire, using particularly powerful and searing gas flames, some of them measuring three to four meters high. I use these to bathe the surface of the painting in such a way that it registered the spontaneous trace of fire.

..the thinking man is no longer the center of the universe, but the universe is the center of the man [referring to collaborations between artists, in which Klein was involved several times]. We shall then know 'prestige' in comparison to the 'vertigo' of before. Thus we shall become men of the air, we shall know the upward force of attraction, towards space, towards nowhere and everywhere at once; having thus mastered the earthly force of attraction we shall literally levitate in complete physical and spiritual freedom.