Plotinus: the ethical treatises : being the treatises of the First Ennead with Porphyry's life of Plotinus, and the Preller-Ritter extracts forming a conspectus of the Plotinian system
Plotinus; Porphyry, ca. 234-ca. 305; Preller, Ludwig, 1809-1861; Ritter, Heinrich, 1791-1869; MacKenna, Stephen, 1872-1934