This quote encapsulates the core belief of applied philosophy—the idea that philosophy should have a tangible, beneficial impact on human life. Epicurus, a Greek philosopher from the Hellenistic period, advocated for a life guided by the pursuit of pleasure and the avoidance of pain, but not through indulgence, rather through moderation and wisdom.

It aligns with his philosophy on the practical nature of philosophical inquiry. The quote underscores his belief that philosophy should serve the purpose of easing human suffering, specifically mental and emotional anguish. Epicurus believed that knowledge and wisdom were not merely academic pursuits but tools to achieve ataraxia (peace of mind) and aponia (absence of pain).

This quote is often cited as part of his ethics of happiness and pleasure, where he argued that living a good life involves eliminating fear and unnecessary desires. While no specific written work from Epicurus directly containing this exact wording survives, it fits within the broader context of his letters, notably his Letter to Menoeceus, and his teachings preserved by later followers, including Diogenes Laërtius in Lives of Eminent Philosophers.