This small pocket book is a writing on the causes of depression and its cure, based on the teachings of the Mother and Sri Aurobindo. It defines depression, its characteristics, reasons for depression and its cure from Yogic point of view. Not only ordinary men, even sadhaks and Yogis undergo depression once in a while. Being a disease of the egoism of man, it needs appropriate dealing with the vital and mental parts of man to cure it effectively.