The author examines classical theories and practices of rhetoric and poetic through close readings and new translations of representative ancient writers, especially Aristotle, Cicero, Quintilian, Vergil, and Longinus. He contrasts techniques of public persuasion with those of imaginative composition, analyzes principles of style and structure, and traces how these technical doctrines shaped later medieval and Renaissance instruction. The study focuses on composition rather than metrics, supplies selective bibliographies and notes, and seeks to recover practical classical precepts useful for modern teaching and writing.