The debate strikes at the heart of what it means to confess that the Christian faith is ‘true.’ As Tolkien wrote, no article of Christian morality is intended exclusively for Christians. Rather, the faith teaches us that submitting to the laws of our creator is the surest way to live reconciled lives with his creation. This is what we ought to mean when we say Christianity is true. We don’t simply mean that it provides factually accurate information about the world or that it offers an authentic path to spiritual fulfillment for those who choose to follow it. We mean that Christianity gives an accurate accounting of the world in its fullness and that it instructs us in how we ought to relate to the world.
Jake Meador in “Why C.S. Lewis is Wrong on Marriage”