Philosophical-theological works. The most important and substantial of these works is On Free Decision (De libero arbitrio), a relatively long work in two versions that is concerned with arguments against the existence of free decision (liberum arbitrium)—especially those based on God’s foreknowledge—and with the nature of free decision itself. Closely related are the shorter works On Truth (De veritate) and On God’s Knowledge (De scientia Dei). These works all appear to date from after ca. 1225, and more probably from the late 1220s or beginning of the 1230s. A short work, On the Order of the Emanation of Caused Things from God (De ordine emamandi causatorum a Deo), attacks the argument that an eternal being can only create eternal creatures. A long letter to Adam Rufus (= Adam of Exeter), the first in Grosseteste’s letter collection, explains how God is form of all things and investigates the relation of body and soul and the location of angels. In the manuscripts this letter is often divided into two distinct works, On the Unique Form of all Things (De unica forma omnium) and On the Intelligences (De intelligentiis).