Preests statement - "If a god is willing to prevent evil, but not able, then he is not omnipotent. If he is able, but not willing, then he must be malevolent. If he is neither able or willing then why call him a god? Why else do bad things happen to good people?" - is almost directly lifted from Epicurus, who is credited with first expounding the problem of evil. David Hume in his Dialogues concerning Natural Religion (1779) cited Epicurus in stating the argument as a series of questions: "Is God willing to prevent evil, but not able? Then is he impotent. Is he able, but not willing? Then is he malevolent. Is he both able and willing? Whence then is evil?"
Initially, Ewan McGregor, Paul Bettany and John Hurt were set to star, but the film's schedule was thrown when McGregor broke his leg in a biking accident and was forced to drop out. Eva Green remained the only member of the original cast.
The man talking to Milo in the room where the red haired woman disappeared to and another unseen character added some tiles to his original cross shaped design on the table. After Milo leaves the camera tilts down as the man writes into his notebook and the additional tiles are gone, reverting back to the cross shape.
(at around 55 mins) When Emilia puts her cigarette out on a round white object, it clearly shows the cigarette falling off of the object onto the table. A few moments later, the next camera angle zooms in revealing the cigarette sitting back on top of the white object.
Preest: If you needed to find someone, the best place to start was the Faith Registration Centre - Meanwhile's melting pot of the pious. Every creed, cult, religion and doctrine pass through these doors, all looking for the same sense of belonging and hope.
At 00:27: This is taken from the original score of Darren Aronofsky's 2006 film The Fountain. It is composed by Clint Mansell and the track is titled "Death is the Road to Awe".Also, in the new trailer that has just came out, a variation of "In The House, In A Heartbeat" by John Murphy (from 28 Days Later) is played.