This book explores emotional intelligence through the theories of Daniel Goleman, highlighting its crucial impact on personal and professional success. Drawing on Goleman's principles, the book examines how emotional mastery, self-awareness and empathy influence leadership and collaboration dynamics. It offers concrete illustrations to address real-life challenges encountered in a variety of professional contexts, demonstrating how the practical application of emotional intelligence can transform human interactions and improve team performance. Essential reading for anyone wishing to understand and integrate these skills into their daily work.