Submits and surrenders to Allaah alone.
It has the desire to love, to gain good and beneficial things for itself, it can feel fear and terror, and it can also surrender and become submissive.
Thus, when its feelings, desires and inclinations are all directed to and for Allaah, then it is a heart that truly worships, submits and surrenders to Allaah alone.
Therefore, it has khawf (fear) of only Allaah; it has rajaa (hope) in Allaah’s Mercy; it has mahabbah (love) for Allaah and whatever Allaah loves; and it has istislaam (submits and surrenders) to only Allaah.
However, when these feelings, desires and inclinations are directed to other than Allaah, then it is a heart that is enslaved and worships that object which has captured and enslaved it.”
— Excerpt from The Great Enslavement by Shaykh Sulaymân as-Sulaymî, Al-Istiqaamah, Issue No.7