Spiritual experiences have occurred within people around the world and throughout history, up to and including the present day. The founders of every major religion described them, philosophers since antiquity have pondered them, and according to recent polls, about 30% of people still report them. A century ago, philosopher and psychologist William James famously analyzed accounts of these experiences and raised questions for future scientific study. What triggers these events? How are the brain and body affected? How do these brief moments have such lasting effects? Now, modern science has some answers.

This book invites readers into contemporary psychology and neuroscience laboratories around the world to learn about these elusive yet profound inner events. As it explores phenomena ranging from divine revelations to paranormal experiences to life-changing experiences of unity, findings from modern science are illustrated with a diverse set of personal accounts from believers and non-believers alike, plunging readers into deeply personal and sometimes transformative moments. Written by two renowned scientists in the field, this book is a deep exploration of the psychology and neuroscience of a range of profoundly meaningful experiences.