What we believe about God dramatically shapes the way that we live. All of us are theologians because we all have thoughts about God. These thoughts shape our lives and mold us into the people we are. The atheist rejects the evidence of a creator God and he or she becomes the ultimate arbitrator of truth and morality. The pantheist sees god in every object. The polytheist believe that the gods fight petty wars among themselves just as humans do. Each of them however forms the thoughts and actions of the people who hold them.
The Theist alone looks to God’s own revelation of Himself for his or her theology. They contend hard with the words of scripture which claim to be spoken directly by Him.
Theology is not difficult because we don’t have God’s words: we have them collected and preserved in the Bible. Theology is difficult because we are fallen and finite beings. Sin distorts our view of God reflected in scripture and we naturally “suppress the truth” (Romans 1:18) about God.
Our theology must be guided by scripture. This is true, but we must also recognize that our nature makes looking at the scripture correctly difficult. For this we must have the one who wrote the scripture enlighten us to understand what He revealed. This is percisely what Paul prays for in Ephesians 1.
16 I do not cease to give thanks for you, remembering you in my prayers, 17 that the God of our Lord Jesus Christ, the Father of glory, may give you a spirit of wisdom and of revelation in the knowledge of him, 18 having the eyes of your hearts enlightened, that you may know what is the hope to which he has called you, what are the riches of his glorious inheritance in the saints, 19 and what is the immeasurable greatness of his power toward us who believe, according to the working of his great might 20 that he worked in Christ when he raised him from the dead and seated him at his right hand in the heavenly places, 21 far above all rule and authority and power and dominion, and above every name that is named, not only in this age but also in the one to come