Winter Light (Swedish: Nattvardsgästerna, lit. 'The Communicants') is a 1963 Swedish drama film written and directed by Ingmar Bergman and starring Bergman regulars Gunnar Björnstrand, Ingrid Thulin and Max von Sydow. The film follows Tomas Ericsson (Björnstrand), pastor of a small rural Swedish church, as he deals with an existential crisis and his Christianity.

References:
https://en.wikipedia.org/wiki/Winter_Light