In a sense, perspective transforms psychophysiological space into mathematical space. It negates the differences between front and back, between right and left, between bodies and intervening space ("empty" space), so that the sum of all the parts of space and all its contents are absorbed into a single "quantum continuum".[5]

Like the empty stage the blandness of the threshold space without the chair is one that conjures up feelings of sadness, fear, barrenness, isolation; an unhospitable space where no one can cross without some form of trepidation.

The chair in the threshold is similar to coming across footprints in the desert with the recognition that you are not alone.