The Faith Once for All - Hardcoverby Jack Cottrell (Author) A Systematic Theology from Dr. Jack Cottrell. At its most basic, the word "theology" means "God talk," the Greek theos originally meaning "God" and logos meaning "word, statement, speech, discourse." God, then, is the ultimate subject and source of theology. Included in theology is the study of the nature of God himself, Christ, and the Holy Spirit. But theology also includes the scope of the Bible itself: the study of the