Predestination Not An All-Encompassing Principle

"Nowhere in Reformed theology is the doctrine of the divine decrees identified as the foundation of theology (principium theologiae) or as the fundamental article (articulus fundamentalis). God's predestinating or determining will is an important element in the Reformed system, but it is not an all-encompassing principle."
-Willem J. van Asselt, Intro to Reformed Scholasticism, 133