Anish Kapoor,  Descent into Limbo, 1992

Anish Kapoor, Descent into Limbo, 1992

...the void manifests itself as a force field in which materiality becomes immaterial, the solidity of objects is negated by recessive and vanishing spaces, and the finite is punctured with apertures indicating the infinite. Once inside the event horizon of each work, the viewer is invited to reflect closely on the micro-physics of viewing: this yields up a disturbingly intense self-awareness. Kapoor’s works oblige the viewer to become sensitive to the continuous processes of cognition and imagination, instinct and dream, sensation and inference, by which the mind constructs the world. Indeed in such an act of aesthetic response, the mind has a sudden and uncanny experience of looking at itself. 

- Nancy Adajania, The Mind Viewing Itself