David Entwistle lays the foundation for his book in the questions, "What is the proper relationship of faith and science? More specifically, what, if any, relationship should be posited between Christianity and psychology" (2004, p. 10)? In order to understand and have a complete appreciation for the depth of the arguments regarding the relationship between Christianity and psychology, Entwistle begins by examining the history of each as well as the worldviews that have resulted from this history. This leads us to explore the movement called integration and the search for a comprehensive definition. Using anecdotes from his years of building models, Entwistle demonstrates how two disciplines, that many feel must be completely separate, can be effectively integrated.
When we look at the relationship of psychology and theology, we are concerned with models based on models; that is we express our understanding of theology in various models, our understanding of psychology in different models, and we then conceptualize their relationship in yet more models (p. 160).
Entwistle makes a key point in laying the foundation of the integrative approach when he contrasts two divergent Christian beliefs. On one hand, some Christians maintain the created universe was the result of eons of cosmic evolution in order to fit with scientific theory. On the other hand, some Christians maintain a literal view of Biblical creation in that the world was created six days. Both views ". . . emphasize who did it while diverging on how it was done" (Entwistle, 2004, p. 121). According to Entwistle, one's view will determine how he or she will approach integration, or whether it is pursued at all (2004, pp. 121, 122).
A large portion of the book is taken up in the exploration of the various models used to understand the various views of integration. Entwistle compares and contrasts the various models and their authors, offering his own model which seems to creatively combine the best of the models put forth. Five paradigms are expounded upon to show the various camps in which Christians and psychologists "live." The first is the Enemies paradigm which is marked by antagonism and an inability to see value in the other's perspective. Two versions of the Enemies paradigm exist. First, the Secular Combatants in which religion is seen as the enemy of psychology and second, the Christian Combatants in which psychology is seen as the enemy of religion (p. 186). The second paradigm is the Spies who see some value in the other's perspective, but attach no corresponding belief in the underlying, usually religious, value system (pp. 208-213). They steal thoughts and ideas and use them as they may. The third paradigm is the Colonialists who see value in psychological ideas and then selectively take what meets their needs without buying into the underlying value of psychology as a discipline (pp. 214-218). The fourth paradigm is the Neutral Parties who believe in exploring the ideas of both psychology and theology without trying to see how either relates to the other (pp. 218-225). Finally, the fifth paradigm is the Allies As Subjects of One Sovereign. This best illustrates how both psychology and theology makes the most sense and best captures the true spirit of integration. Taken together, psychology and theology can illuminate the human condition better than either could individually (pp. 230-234).
One concern I have with Entwistle's book, however, is the very obvious deletion of the work of the Holy Spirit in the integration process. While much was said about God's two books, nothing was said about the indwelling power of the Holy Spirit and how the Holy Spirit can provide guidance, wisdom, understanding, and discernment in the therapy process. Throughout Scripture, but especially in the New Testament, the Holy Spirit is seen to provide guidance and understanding to Christians in a variety of areas. Because of what Jesus Christ has done for us, we as believers received the Holy Spirit who dwells within us (Ephesians 2:18). It is the Holy Spirit who guides us. Romans 8: 5 says, "Those who are dominated by the sinful nature think about sinful things, but those who are controlled by the Holy Spirit think about things that please the Spirit" (New International Version) In Ephesians 5:18 Paul says that we are to let the Holy Spirit fill and control us, and that when we allow the Holy Spirit to control our minds there is life and peace (Romans 8:6b). The Holy Spirit gives us hope and power, as well as the understanding of Scripture by guiding us into all truth.