This new edition of the classic leadership title includes new research and case studies supporting a model for enhancing leadership effectiveness. The core premise of the book is that developing as a whole leader requires developing as a whole person. Research validates that the principles presented in this book are essential to substantial leadership, team, and organizational success. Reminding readers that “we lead by virtue of who we are,” the author updates areas of mastery needed to authentically influence others and create enduring value. Using illustrative stories and tools, the book emphasizes building awareness, building commitment, and building practice.