Nahj al-Balaghah is a book revealed by Amir al-Mu'minin (AS) who was educated and nurtured alongside the revelation and prophecy from the early childhood to adulthood and reached the Abdullahi (God’s servant) position. Nahj al-Balaghah is a revelation of his soul with the aim of educating and training us, the neglectors, surrounded by our egocentricity, hijab, and selfishness. It is a miracle for healing and a tranquilizer for individual and social pains. Moreover, it is a collection with as many dimensions as the dimensions of a human being and a large human society. The book "Psychology in Nahj al-Balaghah" aims to provide us with some valuable teachings and narrations attributed to Ali, cousin and son-in-law of Muhammad (PBUH). This work seeks to present psychological concepts and teachings in a new and updated form. The book is outlined in eight chapters. After introducing Nahj al-Balaghah in the Bibliography section, the foundations of anthropology, human realms, the meaning of life, growth within the life borders, family, behavior and social interaction, and mental health are addressed in the other chapters.