In addition to the Theology, there are two other extant sources for the Arabic Plotinus materials. First, the so-called Letter on Divine Science, falsely ascribed to al-Farabi but in fact based on passages from the fifth Ennead of Plotinus. Second, a group of fragments or sayings ascribed to a ‘Greek sage’. Both the sayings of the Greek sage and the Letter on Divine Science have been shown to derive from the same Arabic version of Plotinus as the Theology. In fact there are passages that show verbatim overlap between the Theology and the sayings.