The purpose of Chrsitianity, I would assume for most, is to live your life more like Jesus, and to believe in god altruistically,(as I see it, this is what Jesus preached, feel free to tell me my folly if you disagree) This, is what Jesus taught, and teaches, but there is an inherent impossibility to act or even attempt to act like Jesus does, because of something in the very deepest dogma of the Christian Religion.
The thing that I am speaking of, is the way Christianity inexorably creates every action, into a Punishment v. Reward system, in which there is always the underlying knowledge that If you fuck up, you will go to hell. The very idea of Heaven and Hell, creates this fundamental flaw, the flaw that all Christians are bound by, the flaw, that they know, good deeds get them in to heaven(in a manor of speaking, faith being seen as a good deed also), and bad deeds keep them out.
So, with this knowledge, even if a altruistic person sets out to do an altruistic deed, he cannot, because he will always know that these deeds will get him into heaven, and thus he has personal gain to receive. He can no longer do an act “just because”, or because “goodness is deep within him”, because of the dogma the church has taught him. They have in a since been corrupted against there religion, by there religion.
So i guess in conclusion, it is inherently impossible for Christians to act like Christ, because of the system of Punishment v. reward, that has been set up by the church. They can no longer do a good act, just for its sake, because they will always know that it gets them into heaven(depending on what you believe), and they can no longer believe in god, just because…