It is “a statement of the tongue, a conviction of the heart, and action by the limbs.” Under it fall values such as: Tawḥid, knowledge of Allah, love, certainty, and dignity (ʿizzah).

It is an all-encompassing term that includes everything Allah loves and by which one draws closer to Him, whether in words, actions, or states, both outward and inward. Servitude is realized through obeying His commands, avoiding His prohibitions, being content with what Allah has granted us, and embodying patience regarding what we have not been given.

It is the refinement and completion of the human soul by safeguarding it from base desires and releasing its higher qualities, through which its rectification is achieved. When a person believes, they continue in the process of tazkiyah (purification), embarking on an ongoing transformation of the self whose effects extend to transforming reality itself. The self becomes righteous by shedding vices and adorning itself with virtues, which then manifest in both outward and inward conduct, embodied in positive relationships with creation. This is closely connected to one of the core objectives of the Prophetic mission, as Allah says: ﴿وَيُزَكِّيهِمْ﴾ “and He purifies them” [Al-Jumu‘ah: 2], and it places the believer in a continuous state of spiritual growth and elevation.