Too often people conceive of Christianity as a repression of desire, and hence a repression of the real self. Christianity tells you to live for others, and not yourselves. Christianity hypocritically tells you to be selfish in order to gain heaven – the logical fallacy is clear.
This misses the heart of the faith. Christianity recognizes that our own desires and others’ desires are bound up together – that our very existences as social and relational creatures disallow me to separate my individuality from yours.
Christianity is not purely altruistic; on the other hand, it is not an egotistical self-gorging of the appetite. It is an acknowledgment that my desires and your desires are somehow inextricably bound up in the cosmic story of creation, salvation, and redemption.