 Plotinus. Around AD 840 parts of Enneads IV–VI (devoted in the Porphyrian edition of Plotinus’ writings to soul, the intelligible world and the One) were translated into  Arabic.[43]  The problems about this translation, and in particular about the transformation of parts of it into the Theology of Aristotle, are dealt with in a separate  entry.[44]  For present purposes, it will suffice to mention the fact that at the beginning of the Theology of Aristotle an author, speaking as if he were Aristotle, proclaims to have devoted this treatise to the First Cause, Intellect and Soul, after having dealt with matter, form, the efficient and final causes in his Metaphysics. This proclaimed “Aristotelian” authorship of the Theology  granted Plotinus’ doctrine an extraordinary impact on subsequent Arabic philosophy, especially in the East of the Muslim world.