Throughout history there have been references and examples in literature, art and philosophy of an increased awareness of life while under the influence of extreme emotions. These have become known as Peak Experiences. Soon after Colin Wilson became aware of this phenomenon in the 1960s, he wondered about its history and how its power could be harnessed, and began a forty-year investigation. In , we see how such luminaries as Yeats, Blake, Sartre, Nietzsche, and Robert Graves were affected by Peak Experiences, and how it has long been noted that we are least insightful when we are at our lowest ebb. By looking in detail through the different areas where this phenomenon has occurred—and by offering anecdotes and examples of how many people in history (as well as himself) were affected—Wilson reveals a pattern of insight with emotions. He ends the book with an instructional section on achieving power consciousness for yourself.