The prophet Muhammad (saw) warned that there is an organ in the body that, if it is correct, the entire body will be correct and if it is diseased or corrupted, the entire body will be corrupted. That organ is the heart. Islam gives detailed guidance about how to purify the soul and heart from any diseases such as envy, grudges, hatred, insincerity, despair and sadness and how to shape a righteous, pious and pure soul with the most upright of values, attitudes and Islamic personality.