diary as plot device

His films frequently use written confessions and diary-like narratives to reveal hidden truths and drive emotional character arcs, particularly in works like 'The Law of Desire' and 'Live Flesh'.

He pioneered the use of diary entries and written reflection as a structural device in cinema, most notably in 'Jules and Jim' and 'The 400 Blows', where diaries serve as windows into characters' innermost thoughts.