"An artist never works under ideal conditions, if they existed his work wouldn´t exist, for the artist doesn´t live in a vacuum. Some sort of pressure must exist; the artist exist because the world is not perfect. Art would be useless if the world were perfect as man wouldn´t look for harmony but would simply live in it"
Insights like the one in the quote above and especially about how we are troubled to deal with solitude. I have just watched his movie "Stalker" recently - not an easy one to watch, but there are many great scenes in it. This video is an excerpt from "Andrei Tarkovsky: A Poet in the Cinema" a great documentary. You can find the full doc on youtube.