At first sight, the discs with their strong relief seem to be the active part of the composition – do they not imprint themselves onto the paper, do they not draw the surface towards them? But the outer shape, a square, lends a moment of tranquillity to the circular movement. This other elementary shape corresponds with the roundness, embedding it in space, in width and height. Equally, the whiteness of the silky paper merges the circle with the square. This characterises the front face, whilst at the back, and only there, the grey cardboard just sits on the surface. This is obscured to the view, instead a secret dominance of the surface is maintained, for the centre of the circle is always empty.
from „Circles – Katrin Süss" by Dr. Ullrich Hartung