Jared Free - Decalogue "No other god before Me"

As I was watching the film it was very difficult for me to find any religious themes, aside from the obvious efforts of Pawel's aunt. I viewed Decalogue I very literally; and did not interpret anything in the film to be symbolic of a more subtle message. During our class discussion however, the themes of the film became very obvious.
For Krzysztof, his world is scientific and empirical. He is a man without faith, and does not rely on prayer or a higher power for guidance. His "god" is his computer. We see this lack of faith in his answer to Pawel's questions about death. They are very "sour" and cold; perhaps Krysztof struggled with this question because the answer was one his computer could not give him.
Throughout the film we repeatedly see the visual of a homeless man. He is always observing He never interacts with the characters, but at the same time is always in a position for the characters to interact with him. I think a pivotal moment in the film comes when Krysztof goes out at night to check the strength of the ice. The computer has just told him that the ice would support Pawel's weight, but here he shows doubt in his "god" by going out to confirm it for himself. While standing on the ice he sees the homeless man sitting in the light of a fire, observing Krysztof's actions. To me this is an interesting interaction between the God Krystof has rejected altogether, and the one he is expressing doubt in.
Maybe that was Krysztof's last chance for redemption. Had he approached the homeless man, God, maybe He would have saved Krystof's son. Instead, he places his faith in a mechanical higher power and loses his son as the consequence.