Systematic theology is tied to exegesis
Systematic theology is tied to exegesis. It coordinates and synthesizes the whole witness of Scripture on the various topics with which it deals. But systematic theology will fail of its task to the extent to which it discards its rootage in biblical theology as properly conceived and developed... The fact is that only when systematic theology is rooted in biblical theology does it exemplify its true function and achieve its purpose.
John Murray, The Westminster Theological Journal 26 (November 1963), 44