The author acknowledges the extensive and diverse field of personality psychology, acknowledging that no single book can comprehensively cover the subject. This book primary focuses on the development aspect of personality, catering to students interested in understanding how personality develops rather than delving into theoretical or personality measurement. The book centers on the idea that an individual's personality pattern is shaped by learning through life experience, while recognizing the hereditary factors. The author doesn't propose a new personality theory but rather aims to synthesize existing research, evaluate conflicting findings, and provide tentive conclusions. The book minimizes distraction by using reference number for specific studies and includes a bibliography to acknowledge the extensive research contributions and the invaluable input of colleagues in development, counselling, and clinical psychology.