In this fully revised edition of his bestselling classic, Daniel J. Siegel--internationally recognized expert on mindfulness and psychotherapy--explores how mindful awareness and integration shape the mind, the brain, and our relationships. Applying neuroscience to therapeutic practice, he offers a groundbreaking examination of what it means to be fully present--as a therapist and as a human being. Central to the book are nine domains of integration that foster emotional balance, bodily regulation, attunement, insight, empathy, intuition, resilience, and healthier relationships. Incorporating fifteen years of new research and clinical insight, this updated edition deepens and expands the original work while remaining practical and accessible. Scientifically rigorous yet grounded in lived experience, it invites readers into the transformative process of mindful integration at the heart of healing and connection. Readers will discover: A primer on mindfulness rooted in practice and scientific discussion The core principles of interpersonal neurobiology to inform any type of therapy New research and data, visuals and metaphors, and a 4D approach to being a therapist Nine domains of integration--consciousness, vertical, bilateral, memory, narrative, state, interpersonal, temporal, and identity--that will help clinicians approach the evaluation, treatment, and assessment aspects of therapy in a foundational way.