What is nafs-i mutama'innah (satisfied soul)?

"If by Divine providence, this (Divine) help and guidance continues, then comes the third stage, which consists of the final stages of spiritual progress, in which the soul of a mu'min, who walks on the path of spirituality, becomes transformed into the satisfied soul (89:27). Such a soul has attained satisfaction according to the standard of God (3:126; 5:113; 8:10; 13:28; 2:260; 17:95), as God says: "O the satisfied soul! return to your Lord, well pleased (with Him), well-pleasing (Him), so enter My (chosen) servants, enter My paradise (87:27-30). This final and supreme bliss is attainable by the Friend of God, not only after death in the next world, but can be perfectly experienced in this world."

 
Source: Qur'anic Healing, pp. 75-76.

All the above ranks of the soul are presented in Fig. 1 shown below:

Fig. 1. The ascent of the soul and its spiritual and intellectual resurrection. 

 

Haizinda — Qayampaya
(Our Present Imam is Living and His NOOR is Eternal)

What do Mu'mins have to achieve in this life time?

"The gift of making kings is not confined to the time of Hazrat Musa (5:20), but the mu'mins of every Prophet (and Imam) can attain spiritual kingdom. However, in order to attain it, there are certain conditions, by fulfilling which, the mu'mins will attain ma'rifat in this life and the kingdom in the next world. For the mu'min cannot be a slave in Paradise, rather, by grace of God, he will be a king (2:247; 3:26; 76:20)"
 
Source: Healing Through Knowledge, pp. 149-150 

Haizinda — Qayampaya
(Our Present Imam is Living and His NOOR is Eternal)