There are many theological systems. Some are built on grace, others on hope, others on atonement, and many terms are interconnected to form a coherent whole. Perhaps it would be helpful to think of theology in the contemporary framework of the world wide web. On a website, there is an interconnected set of sub-sites that all find their root on a home page. From the home page, if one can navigate through the maze of sub-sites, a person will find a locus of knowledge that centers around whatever the creator wishes. The problem is, however, that a web-site is, by nature, limited in its scope of any subject. The nice thing about them is that information can be deleted and added rather seamlessly (thus the rise of wikipedia and other open source software). In the same way, any system of theology centers around a series of ideas and cannot, in and of itself, be an end. Theology is only the study of God, not God himself.
When we read about the “peace of Christ,” the Pauline text also reminds us that it “transcends understanding.” In other words, the peace of Christ cannot be understood in the way we understand facts and conceptions of reality. The peace of Christ ultimately transcends and eclipses all reality. There can be ways in which we begin to understand this peace, but it is primarily experienced rather than understood.