Human personality constitutes one of the most intricate dimensions of existence, having long captivated the attention of scholars across various disciplines. Among the diverse sources of insight, religious teachings—particularly the divine guidance of the Holy Qur’an—play a foundational role in shaping and elevating human character. Personality development is a dynamic and multifaceted process influenced by a constellation of factors. The Qur’an not only delineates the attributes of a sound and exalted personality but also explicates the underlying elements that contribute to its growth. This study, employing a descriptive-analytical approach and utilizing documentary library research, seeks to explore and elucidate the Qur’anic foundations of personality development. The findings affirm that the Qur’an, as a revelatory source, underscores the significance of both hereditary and environmental influences in the maturation of personality. It indicates that biological and genetic factors serve as the foundational substrates of character, while environmental and social determinants—categorized into family, life experiences, cultural context, and social groups—play a pivotal role in shaping identity and behavior. Each of these dimensions contributes meaningfully to the human journey toward moral and existential perfection.