Prophet Muhammad (pbuh) taught: that wrong action is what irritates the heart.The human soul is the state of the heart and it is the essence of the body. It is believed in Islam that we are all born in this world with full submission to our Creator, God, and as we grow, ego takes form and it is diseased societies that will affect our nature.
“Therefore, the heart actually knows wrong actions, and this is one of the reasons they are affected negatively. In crime and punishment, the Russian author Dostoevsky indicates that crime itself is the perpetrators punishment because human beings have to live with the result of their actions: their souls are affected. When people do something against the heart, they act against the soul, and that affects human beings to the degree that they will go into a state of spiritual agitation, and people will use many ways to cover this up. This is what kufr is: ‘kufr’ means ‘covering up.’ To hide their agitation, people use alcohol, drugs, and sexual experimentation; they also seek power, wealth, and fame, taking themselves into the ephemeral world which causes them to forget their essential nature and to forget their hearts. Therefore, people become cut off from their hearts.” – Sh. Hamza Yusuf
According to Muslims the spirit or the soul, is from the command of God: the pre-earthly realm, and it is beyond science and intellect. “And they ask you, [O, Muhammad], about the spirit. Say, “The spirit is of the affair of my Lord. And mankind have not been given of knowledge except a little.” – Quran [17:85]
