Sadi Shirazi is one of the well-known poets in Persian Literature. His vision on political, social, economic, military and almost all aspects of human life is appreciable for the strong color of justice, equality, sympathy, understanding and peace. Studying Gulestan can give the chance to the readers to think and to act in more humanitarian way and care for one another. As Sadi says: What benefits will you derive from a basket of flowers? Carry a leaf from my garden (Gulestan), A rose may continue in bloom for five or six days, But this rose garden will flourish forever. Key words: Persian Literature. Sadi Shirazi. Gulestan. Humanity. Wisdom of Sadi.