.. 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.

In: "Discours pronounce a l'occasion de l'exposition Tinguely a Düsseldorf", Jan. 1959; as quoted in "Dali and Me", Catherine Millet, (translated by Trista Selous), Scheidegger & Spiess AG, 8001 Zurich Switzerland, p. 127