This essay provides a comprehensive overview of emotional intelligence theories, beginning with Goleman's Emotional Competence Framework, which classifies competence into personal (self-awareness, self-management, self-motivation) and social (relationship management, social awareness). It then delves into Stephen Covey's "7 Habits of Highly Effective People," linking emotional skills to proactive behavior, goal-oriented focus, prioritization, win-win solutions, empathetic understanding, synergy, and holistic self-improvement. Finally, the essay explores Erik Erikson's Stages of Psychological Development, outlining the eight stages from infancy to late adulthood and their impact on personality development, including trust vs. mistrust, autonomy vs. shame, initiative vs. guilt, industry vs. inferiority, identity vs. role confusion, intimacy vs. isolation, generativity vs. stagnation, and integrity vs. despair. The essay emphasizes the importance of emotional intelligence in personal and professional success and the various models that contribute to its understanding.