Positive emotions are fleeting affective states that broaden cognition and behavior while building enduring personal resources—an insight formalized in Barbara Fredrickson's broaden-and-build theory. Unlike negative emotions that narrow focus toward immediate threats, positive emotions expand awareness, creativity, and social connection. Understanding how to intentionally cultivate these states offers evidence-based pathways to enhanced well-being, resilience, and physical health beyond simply reducing distress. A key insight: positive and negative emotions operate on independent continua, meaning low negativity does not guarantee high positivity—deliberate cultivation is necessary.