Andrzej Żuławski had already written the script for The Devil, his second feature-length film, before the production of his debut The Third Part of the Night, and published a short novella about the Devil who leads the unfortunate Jakub down the wrong path in the volume Piekielnicy (Infernals). In an extended interview conducted by Kletowski and Marecki, the director said:
This is the only film work of mine that I have dared to print with purely literary texts, precisely because there is a great discrepancy between the film shot and the text itself.
When Żuławski began preparations for the film, the concept for the picture changed significantly. The Devil, who on the pages of the novella was a terrifying, inhuman creature, was gradually humanised. The director’s original idea that the film’s Devil should wear a terrifying mask was forgotten.
‘The horror lies in the man, not in the trappings of that man.’ – said Andrzej Żuławski in the interview quoted above, and his The Devil was a testament to this way of thinking.
For Żuławski wanted to make a horror film about humanity, about the evil hidden in people and lurking to be unleashed and given expression. Żuławski’s evil did not come from outside, but resounded like the protagonist’s inner voice. The Devil, in Wojciech Pszoniak’s masterful interpretation, was merely the midwife of evil, not its source.