The task of theology is not the same as the task of interpreting Scripture.  However, they complement each other. A very loose description of theology is that theology is the exercise of thinking about God. Anytime, anywhere, a person thinks about God, theology is taking place. Nonetheless, a proper theological exercise must be taken further and deeper. John Wesley affirmed the authority of Scripture for correct biblical interpretation and theology. He  contributed what is known as the Wesleyan Quadrilateral. He recognized four sources for constructing theology: Scripture, reason, tradition, and experience: 

Scripture. The central source for any theology. It is only out of this source that the other three can have meaning. 

By Reason, it is understood that a theological tenet must make sense with who God is as described in the Biblical witness. 

Tradition refers to the tradition of the Christian church. In other words, one must consider the ways in which the Church has believed and understood a specific belief.

Experience refers to one’s or a community’s experience.

Wesley’s view of Scripture would not allow, and it should not be, that these sources of theology are taken individually or out of context.

The Wesleyan Quadrilateral is without a doubt a great tool to learn to believe correctly about God. 

W Q Applied. Belief: Jesus is God.

Scripture: The witness of the gospels and the entire New Testament without a doubt testify to the deity of Christ.

Reason: Does it make sense that Jesus was God? It would not if he would not have told us so. However, he told us that he was one with the father, that he and the father are one. The is trustworthy because His life and ministry back his own claims so therefore it makes sense to believe what he said about himself.

Experience: By my experience and the one of millions of people throughout history I can testify that Jesus is God. 

Tradition: Since the beginnings of Christianity –as described in the book of Acts-  the church has believed that Jesus was indeed who he said he was. The followers of Christ since then have believed in the deity of Christ. This has been made evident in their lives, and it has been affirmed collectively as the people of God (i.e Nicene Creed A.D. 325)

As a result of this, one can say that it is correct to believe that Jesus is God.  Try it out! Think of a belief that you have heard and use the WQ to test it.