Providing Spiritual Guidance through the course of Purification of the Heart. So that one can save themselves from the Punishment of Hellfire & enter Paradise. An individual is trained in this Path to Purify his Body, Mind, Heart and Soul from sins and, then how to maintain their Purity -- this is known as Self-Purification (Tazkiyah Nafs).

After a person purifies himself he becomes the beloved of Allah and Allah the Exalted becomes pleased and happy with that person, or else after death an excruciating torment awaits him.
Enlighten your soul.