Let’s recur to your original question and ask another: Does Christianity have anything important to say about the human mind, spirituality, behavior and morality? Indeed, it does. Christianity holds two fundamental doctrines about human nature, which we dare not neglect in our scholarship: (1) human beings bear the image of God; and (2) since the Fall, we possess a sinful nature.
Of course, these statements of doctrine raise yet more questions: What is God like? What does it mean that we bear God’s image? Moreover, what is sin? And what does it mean to say that human beings now possess a sinful nature? Finally, how should our reflection upon such questions influence the way in which we think (and write) about the human mind, spirituality, behavior and morality?
My purpose in raising such questions is not to answer them — at least, not here. Rather, I want to make clear just how deeply Christian doctrine speaks to so many of the most important questions that we can ask about human beings. If Christian scholars do not take the initiative to provide careful and sympathetic answers to such questions, who will?