observer

His films obsessively explore the act of watching and the gap between observation and understanding, particularly in works like 'Blow-Up' where a photographer discovers meaning through scrutinizing his own photographs.

He made voyeurism and the observer's perspective central to cinema itself, from 'Rear Window' to 'Psycho,' constantly implicating the audience as complicit observers.

His meditative films demand the viewer become an active observer navigating time and memory, as in 'Stalker' and 'Mirror,' where observation becomes a spiritual act of patience and contemplation.