An American movie put out in 1999, directed by Alison Maclean, and starring Billy Crudup and Samantha Morton. It was based on the book by Denis Johnson. It's a simple tale of drug addiction and such, and doesn't really break any ground that you wouldn't expect it to. Maybe I've simply seen too many films on the subject....

The title, I think, is a reference to the Velvet Underground song, Heroin ("I feel just like Jesus' son"). I couldn't find any reference to the protagonist (played by Billy Crudup) actually being Jesus' son in the film, though there are a couple of scenes with hinting imagery, and fairly effective use of surrealism. For example, he looks through a window in a diner; on the other side of the window, looking in, it appears as if he has a halo hovering over his head.