linguistic:paraphrasing
Personality and religious leanings

According to Baha ad-Din ibn Shaddad (one of Saladin's contemporary biographers), Saladin was a pious Muslim—he loved hearing Quran recitals, prayed punctually, and "hated the philosophers, those that denied God's attributes, the materialists and those who stubbornly rejected the Holy Law." He was also a supporter of Sufism and a patron of khanqahs (Sufi hostels) in Egypt and Syria, in addition to madrasas that provided orthodox Sunni teachings. Above all else he was a devotee of jihad:

The sacred works are full of passages referring to the jihad. Saladin was more assiduous and zealous in this than in anything else.... Jihad and the suffering involved in it weighed heavily on his heart and his whole being in every limb; he spoke of nothing else, thought only about equipment for the fight, was interested only in those who had taken up arms, had little sympathy with anyone who spoke of anything else or encouraged any other activity.

In 1174, Saladin ordered the arrest of a Sufi mystic, Qadid al-Qaffas (Arabic: قديد القفاص), in Alexandria. In 1191, he ordered his son to execute the Sufi philosopher Yahya al-Suhrawardi, the founder of the Illuminationist current in Islamic philosophy, in Aleppo. Ibn Shaddad, who describes this event as part of his chapter on the sultan's piety, states that Al-Suhrawardi was said to have "rejected the Holy Law and declared it invalid." After consulting with some of the ulama (religious scholars), Saladin ordered al-Suhrawardi's execution. Saladin also opposed the Order of Assassins, an extremist Isma'ili Shi'i sect in Iran and Syria, seeing them as heretics and as being too close with the Crusaders.

Saladin welcomed Asiatic Sufis to Egypt and he and his followers founded and endowed many khanqahs and zawiyas of which al-Maqrizi gives a long list. But it is not yet clear what Saladin's interests in the khanqah actually were and why he specifically wanted Sufis from outside Egypt. The answers to these questions lie in the kinds of Sufis he wished to attract. In addition to requiring that the Sufis come from outside Egypt, the waqfiyya seems to have specified that they be of a very particular type:

The inhabitants of the khanqah were known for religious knowledge and piety and their baraka (blessings) was sought after... The founder stipulated that the khanqah be endowed for the Sufis as a group, those coming from abroad and settling in Cairo and Fustat. If those could not be found, then it would be for the poor jurists, either Shafi'i or Maliki, and Ash'ari in their creed.