Rhetorical Triangle

The Rhetorical Triangle represents the three rhetorical appeals created by Aristotle. The Greek terms "pathos", "logos", and "ethos" compose the triangle. "Pathos" means appealing to emotions; "ethos" means appealing to ethics; "logos" means logic. The balance of these terms creates a powerful way to convey a message in any communication style.
Examples of each Greek term.
This is ethos because it refers to reputable sources.
This is pathos because it appeals to emotions of readers. 
This is an example of logos because it offers statistics to support a claim.