The person who interacts with this existence with its various components is a psychological formation, is a personality that is distinguished and unique with certain characteristics, and realizes itself in work and production and in the system of various social relations, and uses what has capabilities and energies in interaction with this world and upgrading it. The human being is the focus of work, production, economics, administration, politics, science, and art. It is the focus of it, with its capabilities and psychological characteristics, and what lies behind changing this existence in terms of motivational effort and creative power are capabilities that are unique to man in its construction. Therefore, it is not surprising that psychology and its laws and principles penetrate into all different sectors of life. Rather, psychology - with its laws and methods - has become a function of the level of civilized progress in our contemporary world. This book, with its twelve chapters, came to shed light on various topics in psychology in terms of its inception, schools, goals, and processes such as remembering, forgetting, feeling, intelligence, thinking, emotions, and motives behind human behavior, and how the human personality may experience psychological disorders and how to maintain mental health to the individual. Each chapter is characterized by a basic and simplified scientific material, which aims to provide useful psychology with its basic aspects, written in an interesting, accessible and concise style. We hope that this book will be useful and practical.