I think he can save himself time by confining his attention to two systems–Hinduism and Christianity. I believe these are the two serious options for an adult mind. Materialism is a philosophy for boys. The purely moral systems like Stoicism and Confucianism are philosophies for aristocrats.  Islam is only a Christian heresy, and Buddhism a [...]

It must also be remembered that only a minority of the religions of the world have a theology. There was no systematic series of statements which the Greeks agree in believing about Zeus.
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C. S. Lewis, “Is Theology Poetry?” in The Weight of Glory and Other Addresses (New York: HarperCollins, 2001), 116-17.