Bradley begins with the charges against Christianity–its alleged arrogance toward nature and glorification of man at the expense of the earth–and rebuts them. He accepts that Christians have been dismissive toward nature through the centuries, but he argues that this neglect has been a perversion of the Christian message.
By plumbing the Bible, the writings of the early Christians and of the Celtic Christian Church, and the testimony of mystics through the ages, Bradley shows that a sacred world is at the heart of Christian belief. He even argues that of all world religions, Christianity has the greatest claim to be environmentalist because it professes that God is incarnate in the very stuff of nature.