"Christian Theology What Is It?" The word "theology" comes from two Greek words meaning "God" and "word." Combined, the word "theology" means "study of God." Christian theology is the study of what the Bible teaches and what Christians believe. Many believers treat Christian theology as something that is dividing, something that should be avoided. In actuality, Christian theology should be uniting! The Word of God teaches truth and we are to be united behind that truth. Yes, there are disagreements and disputes in Christian theology. Yes, there is freedom to disagree on the non-essentials of Christian theology. At the same time, there is much that Christians should be united over. A Biblically-based Christian theology will enable us to better understand God, salvation, and our mission in this world.