More people should see this beautiful film! It is easily available on amazon.fr (with subtitles), free for streaming on youtube or google video, or for download on the usual sites. It looks great and the print is fine for 1943. The grim corridors of the prison and the foggy streets outside the prison, makes for a suitably noirish contrast to the shining white walls and robes in the convent. Although the professional actors and the suspenseful plot make this an atypical Bresson film, the careful camera framing and the discrete panning produces typically sparse and detailed interiors. The plot may be melodramatic and music a bit intruding at times, but almost every scene is a joy to behold. There are a lot of interesting little touches that show in great detail the daily life and the more mundane side of convent life, clothing regulations, mores etc.
I find that I watch this film more for the aesthetic quality of the individual scenes than for any statement the film as a whole might have. There are also many oddities: For example when Therese knocks upon the convent door after shooting her betrayer, sister Anne Marie is chanting a text from what, one might assume, is a book of prayers. The title, however, reads: "Leo Tolstoj : Krig og fred", which makes it a Norwegian or Danish version of Tolstoy's War and Peace. Strange? But the most impressive and memorable sight in the film for me is the early scene when the submissive sisters lay face down with arms outstretched cross-like on the cold floor. It is almost frightening in its austere beauty, and also very strange for anyone without convent practice. It is the strangeness that does it. Like every Bresson film, I guess.
