Ennead IV.4.30â45 and IV.5 retrieves the unity in this last section of Plotinusâ treatise on âProblems concerning the Soulâ. Combining translation with commentary, Gurtler enhances both the accuracy of the translation and the recovery of Plotinusâ often unsuspected originality. This is especially true for IV.5, where previous translations fail to convey the concise nature of his argument.