Jesus said, “An evil man out of the evil treasure of his heart brings forth evil things” (Matthew 12:35). A critical element of the gospel (which is left out of many contemporary presentations) is the reality of the evil that abides within us, and the damning effect it produces through our words and deeds. This film exposes the evil heart of Daniel Plainview (and, and by extension, of every human being) as he recklessly pursues the satisfaction of his passions. Some people are psychologically abused in this pursuit, others are physically abused and some even die. Even family ties are no match for the unrestrained depravity that overtakes this man by the end of the film, resulting in his being abandoned by everyone, including his own conscience, which is the ultimate end of sin. Daniel Plainview’s closing line in the film is nothing more than a paraphrase of James 1:15: “Sin, when it is finished, brings forth death.”
Many evangelical Christians have also concluded the film is openly hostile toward the Christian faith. Perhaps. But the burden for the Christian is to explain that the film doesn't depict the true Christian faith at all. It depicts a counterfeit religion masquerading as Christianity, accurately depicting the sin within the heart of those who profess to be ministers of the gospel but who are in reality committed only to their own profit and pleasure—at the expense of deceived followers.
The final scene brings this point home. The faith healing prophet/preacher Eli Sunday comes to Daniel Plainview with a proposition which unveils the depravity of his own heart. Plainview unmasks the preacher, exposing his hypocrisy by demanding Sunday to repeat, "I am a false prophet and God is a superstition."
The philosophy expressed in those words rightly offends the sensibilities of Christians. But taken in the context in which they are spoken, these words are an honest confession of faith, revealing a heart far from God spoken through lips that have heretofore “honored” Him (cf. Matthew 15:18), thus exposing the evil heart. Unless we are confronted with the evil within our own hearts, we believe we have nothing to be saved from and therefore the Christian gospel has nothing of importance to say to us (cf. 1 Corinthians 1:20-25).
“There Will Be Blood” is not the positive, uplifting "Christian" film evangelicals prefer, but it doesn't have to be in order to proclaim Christian truth. Truth is present in the inability of its lead characters to achieve lasting peace through the unrestrained pursuit of their depraved passions, affirming the Christian’s conviction that only the gospel of Jesus Christ can cure the evil in the human heart.
The absence of this gospel is the reason for the violence. In the end the film cries out for a resolution that only the gospel of Jesus Christ can offer. By leaving out an explicit presentation of the gospel the screenplay inadvertently, if not intentionally, leaves the need for the gospel in PLAIN VIEW.