This article is a review of two textbooks in the field of the history of Christian thought, 20th Century Theology: God and the World in a Transitional Age by Grenz and Olson and Historical Theology: An Introduction to the History of Christian Thought by A. McGrath. The first three parts of the article make some comparisons of the subjects and the methods of these two books. Then part four focuses on a hypothesis in 20th Century Theology, that in Christian theology there was and is a kind of balance between divine transcendence and immanence. With the doubt of this balance the fifth part of the article questions an idea held by contemparory Confucians, which sets the transcendence from within (in Confucianism) to be in contrast to that from without (in Christianity).