One of the central concerns of the modern day judicial system is the nature of justice. Everyday in courtrooms across the world justice and retribution are debated and enacted in a countless array of contexts. Even as this is a pervasive contemporary concern, philosophical investigations into the nature of justice date back to at least Greek antiquity. In these regards, justice is a prominent consideration in the work of both Plato and Epicurus. While these philosophers articulated early notions of justice, they do so in slightly divergent ways. This essay examines these notions of justice in Plato’s Apology and selections from Epicurus. One of the predominant aspects of justice in Plato’s Apology and selections from Epicurus is the nature of the medium of expression. In the Apology, Plato explores the notion of justice through Socrates’ trial and defense; conversely, Epicurus’ writing is generally relayed through point-by-point aphorisms. In this context of understanding, the medium through which justice is expressed necessitates that there are slightly different formulations. Consider Epicurus who writes, “Natural justice is a pledge of reciprocal benefit, to prevent one man from harming or being harmed by another” (Epicurus, pg. 10). This notion characterizes justice as not a social arrangement, but a natural element of life that occurs as humans pledge reciprocal benefit to stop one man from harming another.