There are no rules and regulations for perfect composition. If there were we would be able to put all the information into a computer and would come out with a masterpiece. We know that’s impossible. You have to compose by the seat of your pants.
The subject must be thought of in terms of the 20th century, of houses he lives in and places he works, in terms of the kind of light the windows in these places let through and by which we see him every day.