There is no point in studying theology if God does not exist!
This is one of many posts that will eventually come together in a coherent way in the study of theology. In the mean-time enjoy the bite-size pieces that will arrive here on this blog! Most of these will also be imageless – sorry!
Christians not only believe He exists but that He has deliberately revealed Himself to us through a variety of methods. Miracles, traditions, the Church, creation, experience, reason, history, etc but the ultimate revealing was done in Jesus Christ. We know for sure about Jesus Christ because of the Word of God: Scripture: The Bible. The Bible simply takes it for granted that God exists from the very first verse (Gen 1.1)…in the beginning God created… This God, our God…’transcends the entire creation, but is at the same time immanent in every part of it’.  There is a point in studying theology for God does exist.
Of course, it is not something that we can prove beyond all doubt but is something that is grasped by faith (faith = trust). This is not faith without any basis in reality as some prominent atheists want to espouse as our belief system but it is indeed based on reliable evidence contained in Scripture, especially. Now, it is up to us to mine the riches of Scripture and to know and pursue the knowledge of God (Hos 6.3). This knowledge though is more fully revealed to believers and therefore this Queen of Sciences known as Theology, is darkness and foolishness for those who do not believe. But once Jesus is believed on then we see with clearer light and see the wisdom of God in all His works.
The evidence for this is also found in Scripture: Matthew 11:27 (NKJV) 27 All things have been delivered to Me by My Father, and no one knows the Son except the Father. Nor does anyone know the Father except the Son, and the one to whom the Son wills to reveal Him. We see, then, the impossibility of knowing God without us knowing Him through Jesus Christ and therefore the study of Him without this real knowledge is going to fall far short.
There is a revelation called ‘General Revelation’ which is, especially, found in nature that God can be seen and known in it. This revelation though falls short of any knowledge about the saving grace found only in Jesus Christ. The revelation reveals God’s creation, His creativity, His awesomeness, His providential care for what He has made, among other attributes. These are a precursor to us seeking God. The fear of the Lord is both the beginning of knowledge and of wisdom. We, therefore, lack both if the Lord is not truly Lord of our lives.
 Berkhof, L. (1938). Systematic theology (21). Grand Rapids, MI: Wm. B. Eerdmans publishing co.