This is necessary. Only then does the owner of this nafs (the lower self) become praiseworthy by rising through gratitude. As Allah the Exalted has said: "O reassured soul! Return to your Lord, well-pleased and pleasing [to Him]. And enter among My [righteous] servants and enter My Paradise." (al-Fajr 89:27-30)
The nafs-i kāmila (perfected nafs) is at the highest rank in servitude. Its possessor closes all doors through which Satan might enter, leaving no path, and fulfills the duties of rubūbiyya (divine lordship) of the Real, both outwardly and inwardly, thus becoming among the people of witnessing and gnosis, and among those who have attained to Allah. (Rihle, 277)
The abode of the nafs is the sharia, the ruh (the spirit) is from the world of command, and the qalb (the heart) is the abode of majesty. (Nafahāt, 72)
The nafs-i mulhima is the one referred to in the verse: "And [by] the soul and He who proportioned it and inspired it [with discernment of] its wickedness and its righteousness..." (ash-Shams 91:8), as Allah the Exalted has explained with bayān (clear exposition). This nafs is so called because it is distant from the station of firmness and stability. It must be purified through gayret (spiritual striving) and effort.
The nafs-i mutma'inna is the beginning of the degrees of kamāl (perfection). In all its rulings, this nafs should be rāḍiyya (well-pleased) and marḍiyya (well-pleasing, i.e., pleasing to God). Only then does the owner of this nafs, after giving thanks and rising, become worthy of praise. As Allah the Exalted has said: "O reassured soul! Return to your Lord, well-pleased and pleasing [to Him]. And enter among My [righteous] servants and enter My Paradise." (al-Fajr 89:27-30)
The nafs-i kāmila is at the highest rank in ʿubūdiyya (servitude). Its possessor closes all doors through which Satan might enter, both outwardly and inwardly, and fulfills the duties of rubūbiyya of the Real, thus becoming among the people of witnessing, gnosis, and those who have attained to Allah. (Nafahāt, 160)
(See also: ʿaql; qalb; ruh)