Why did Jean-Luc Godard sometimes give actors their lines from behind the camera?

Jean-Luc Godard employed improvisatory techniques, including speaking lines to actors from behind the camera during takes, as part of his unique filmmaking process. He used these methods to observe reality, impose his own artistic vision, or interrelate the two to create a "strangely abstract effect" in his work.1

This practice was consistent with the "drastic nonchalance" of his improvisational style, which often involved shooting without a formal script. By feeding lines to the performers, Godard could maintain control over the dialogue while fostering an environment where the theme and motifs of a film might emerge spontaneously during production.1