This book is over 35 years old and not particularly well-written. A professional contact gave it to me during a business meeting and thought I'd like it. It has one main point repeated over and over. The author wants scientists to research spiritual and religious beliefs with the same rigor as other scientific endeavors. He uses the word humble repeatedly to explain why he thinks this doesn't happen; religious leaders are so sure of their beliefs being right that they don't want to humble themselves to the possibility of better researched truth and beliefs. Some passages are New Age and some are fundamental Christian, with other representations as well. I don't recommend this book.