This book gives us a good general idea about the doctrines of Freud and his students and the extent of their differences. It clearly explains what is acceptable among the "Freudian" principles and what needs evidence to support it. It also exposes what is abnormal and rejected by reason and logic. Despite the passage of years since the publication of Freud's works, Joseph Jastrow's book It is considered one of the best books concerned with presenting "Freudian" doctrines and criticizing them in a good spirit, despite the harsh criticism that appears at times. Some readers may notice that science is slow in achieving what scholars have disagreed about in psychoanalysis, but a look at the long past and the psychological discoveries we have recorded in it convinces them that psychology has advanced in great strides since the emergence of Freud, who opened new horizons for exploring the depths of the highly complex human psyche.