Biblical theology is the study of a certain book (or books) of the Bible and emphasizing the different aspects of theology it focuses on. For example, the Gospel of John is very Christological since it focuses so much on the deity of Christ (John 1:1, 14; 8:58; 10:30; 20:28).
Kwa mfano, Injili ya Yohana inaelezea sana kuhusu Yesu kwa vile inaangazia uungu wa Kristo (Yohana 1:1, 14; 8:58; 10:30; 20:28). Historia ya teolojia ni somo la kanuni na namna zimejipuka katika karne nyingi ya kanisa. utaratibu wa teolojia ni somo la kanuni za mfumo wa teolojia.