This document provides an overview of rhetorical theory, including definitions of key concepts from Aristotle and Cicero. It discusses rhetoric as the art of persuasion through discourse. The three modes of persuasion are ethos, pathos, and logos. It also outlines Cicero's five canons of rhetoric: invention, arrangement, style, memory, and delivery. Invention involves discovering arguments, arrangement is organizing them logically, and style is expressing ideas artfully. Memory is retaining information and delivery is presenting a message effectively through oral or written communication. The document provides definitions and explanations of these fundamental concepts in rhetorical theory.