The science of the sufis is the esoteric, exoteric knowledge of Deen and strength of belief; and this is the greatest of sciences. The way of the sufis is perfecting their morals and perpetual absorption in Allah. The essence of Taüawwuf is to be embellished with the meanings of the attributes [sifat] of Allah [as humanly as possible], to eliminate the will of the self, and have a perpetual infatuation to please Allah. The morals of the sufis are the same as the Blessed Prophet’s Sallallahu alayhi wa sallam (ﻢﻠﺳ و ﻪﯿﻠﻋ ﷲ ﻰﻠﺻ ) as mentioned in the Quran, ‘And you are surely on an excellent standard of character.’68:4 All that is mentioned in the ahadith is also inclusive of the morals of the sufis. Below is a description of the morals of the sufis:

—— To think lowly of oneself and this is the opposite of arrogance.
—— To be compassionate to the creation of Allah u and to overlook the transgressions of the creation against oneself.
—— To treat others with kindness and warmth and to avoid anger.
—— To sympathize with others and to prefer them over oneself because of one’s overwhelming love for them; in essence, to favor the rights ofothers over one’s own rights.
—— To be generous —— To forgive others and to overlook their mistakes.
—— To be sanguine and cheerful —— To be soft-spoken —— To avoid ostentation.
—— To spend without stinginess and to avoid overspending such that one becomes needy.
—— Reliance on the Creator —— To be content with whatever little one possesses of the material world.
—— To be austere To avoid arguments and altercations and to avoid criticizing another unless it is with truth.
—— To avoid jealousy or hatred of another —— To fulfill promises.
—— Forbearance —— To have insight —— To love fellow Muslims and have good relations with them and to avoid others —— To be grateful when someone does a favor —— To exhaust oneself for the good of other Muslims

The moral character [akhlaq] of the sufi is achieved through his purification of the inner and the outer and Tasawwuf is the name of propriety. Propriety towards the Creator is turning away from everyone but Him out of awe and fear of His might. The worst of sins is to converse with the lower self, as it spreads darkness over the heart.

Shaykh al-hadith Muhammad Zakariyya Kóndhelwi Ra Sharia & Tariqa: Islamic Law and Purification of the Heart p105-107