Per Kirkeby Quote

This method does not call up the invisible layers. The invocatory tone of intercourse is the 'synthetic', which does not seek results immediately but treats the picture sensually and then allows the apparently most unreasonable associations to grow. In this way invisible layers in oneself are invoked, and this is the only kind of invisible layer in the picture which allows itself to be invoked. This is 'unscientific' and apparently uncontrollable and subjective. But the subjective is to a large extent the common; the invisible, subterranean layers are fertile soil for the great common pictures.

'Bravura', Per Kirkeby, (1982)