The self-concept is an important part in the development of the human personality is always evolving to be influenced by the environment. Whether it be a positive self-concept and negative self-concept are all the result of the interaction of individuals with their environment. It is important to develop the self-concept to be done by reaching the serenity.
The methodology of this thesis is library research which is by doing some research on some books and journal and by observing of the literature, books, journals and other records that have a connected to the theme of self-concept and nafs mutma’innah.
From the research that have done the researcher found that the state of nafs mutma’innah or serenity of soul is the goal for everyone. It is the highest state of spiritual development. Serenity soul is in a state of harmony, happy, comfortable and peaceful. This soul is in a state of calm, knowing, despite the failure of the world, it will go back to God. In the development of self-concept should be based on the underlying to the faith by performing tazkiyatun nafs which is by performing mujahadah and riyadah.