The Silence (1963) IMDb
Seen in 2019.
Despite Bergman’s stated intentions, the silence of Abraham’s god doesn’t seem to be a prominent subject. I can only read the film as an allegory of other things, and in that framework, very little of interest is said that wasn’t already said in “Ecclesiastes” (ca. 400–180 BCE). It might have been better if a real central-European country had been used instead of a pretty lazy conlang Ruritania.
References here: Persona (1966).