Sufi metaphysics

Some scholars have claimed that the difference between the two philosophies differ only in semantics and that the entire debate is merely a collection of "verbal controversies" which have come about because of ambiguous language. However, the concept of the relationship between God and the universe is still actively debated both among Sufis and between Sufis and non-Sufi Muslims.

Waḥdat al-wujūd (unity of existence)

The mystical thinker and theologian Abu Saeed Mubarak Makhzoomi discussed the concept of waḥdat al-wujūd in his book Tohfa Mursala. However, the Sufi saint who discussed the ideology of Sufi metaphysics to the greatest depth is Ibn Arabi. He employed the term wujud to refer to God as the "Necessary Being". He also attributed the term to everything other than God, but insisted that wujud does not belong to the things found in the cosmos in any real sense. Rather, the things borrow wujud from God, much as the earth borrows light from the sun.

The issue is how wujūd can rightfully be attributed to the things, also called "entities" (aʿyān). From the perspective of tanzih, Ibn Arabi declared that wujūd belongs to God alone, and, in his famous phrase, the things "have never smelt a whiff of wujud." From the point of view of tashbih (anthropomorphism), he affirmed that all things are wujūd's self-disclosure (tajalli) or self-manifestation (ẓohur). In sum, all things are "He/not He" (howa/lāhowa), which is to say that they are both God and not God, both wujud and not wujud. In his book Fusus al-Hikam, Ibn-e-Arabi states that "wujūd is the unknowable and inaccessible ground of everything that exists. God alone is true wujūd, while all things dwell in nonexistence, so also wujūd alone is nondelimited (muṭlaq), while everything else is constrained, confined, and constricted. Wujūd is the absolute, infinite, nondelimited reality of God, while all others remain relative, finite, and delimited".

Ibn Arabi's doctrine of waḥdat al-wujūd focuses on the esoteric (batin) reality of creatures instead of exoteric (zahir) dimension of reality. Therefore, he interprets that wujud is the one and unique reality from which all reality derives. The external world of sensible objects is but a fleeting shadow of the Real (al-Haqq), God. God alone is the all embracing and eternal reality. Whatever exists is the shadow (tajalli) of the Real and is not independent of God. This is summed up in Ibn Arabi's own words: "Glory to Him who created all things, being Himself their very essence (ainuha)".

To call wujud or Real Being "one" is to speak of the unity of the Essence. In other terms, it is to say that Being—Light in itself—is nondelimited (mutlaq), that is, infinity and absolute, undefined and indefinable, indistinct and indistinguishable. In contrast, everything other than Being—every existent thing (mawjûd)—is distinct, defined, and limited (muqayyad). The Real is incomparable and transcendent, but it discloses itself (tajallî) in all things, so it is also similar and immanent. It possesses such utter nondelimitation that it is not delimited by nondelimitation. "God possesses Nondelimited Being, but no delimitation prevents Him from delimitation. On the contrary, He possesses all delimitations, so He is nondelimited delimitation" On the highest level, wujūd is the absolute and nondelimited reality of God, the "Necessary Being" (wājib al-wujūd) that cannot not exist. In this sense, wujūd designates the Essence of God or of the Real (dhāt al-ḥaqq), the only reality that is real in every respect. On lower levels, wujūd is the underlying substance of "everything other than God" (māsiwāAllāh)—which is how Ibn Arabi and others define the "cosmos" or "universe" (al-ʿālam). Hence, in a secondary meaning, the term wujūd is used as shorthand to refer to the whole cosmos, to everything that exists. It can also be employed to refer to the existence of each and every thing that is found in the universe.

God's 'names' or 'attributes', on the other hand, are the relationships which can be discerned between the Essence and the cosmos. They are known to God because he knows every object of knowledge, but they are not existent entities or ontological qualities, for this would imply plurality in the godhead.

Ibn 'Arabî used the term "effusion" (fayd) to denote the act of creation. His writings contain expressions which show different stages of creation, a distinction merely logical and not actual. The following gives details about his vision of creation in three stages: the Most Holy Effusion (al-fayd al-aqdas), the Holy Effusion (al-fayd al-muqaddas) and the Perpetual Effusion (al-fayd al-mustamirr). Waḥdat al-wujūd spread through the teachings of the Sufis like Qunyawi, Jandi, Tilimsani, Qayshari, Jami etc.

The noted scholar Muhibullah Allahabadi strongly supported the doctrine.

Sachal Sarmast and Bulleh Shah, two Sufi poets from present day Pakistan, were also ardent followers of Waḥdat al-wujūd. It is also associated with the Hamah Ust (Persian meaning "He is the only one") philosophy in South Asia.

Tashkīk

Tashkīk or gradation is closely associated with the Sadrian interpretation of waḥdat al-wujūd. According to this school, the reality and existence are identical which means existence is one but graded in intensity. This methodology was given a name of tashkik al-wujud and it thus explains that there is gradation of existence that stand in a vast hierarchical chain of being (marāṭib al-wujūd) from floor (farsh) to divine throne (ʿarsh), but the wujūd of each existent māhīyya is nothing but a grade of the single reality of wujūd whose source is God, the absolute being (al-wujūd al-mutlaq). What differentiates the wujūd of different existents is nothing but wujūd in different degrees of strength and weakness. The universe is nothing but different degrees of strengths and weaknesses of wujūd, ranging from intense degree of wujūd of arch-angelic realities, to the dim wujūd of lowly dust from which Adam was made.