These images are of physical objects, handmade by an individual. You can't see how he put the paint down here. You can't sit in the room. To be surrounded by paintings like this can evoke hallucinatory retinal effects. When I saw them the first time I had to pinch myself.
When I realized art by Agnes Martin and John McLaughlin represented something crucial for me I wondered how to arrive at an authentic response. It has taken a really long time!