Wahdat Al-Wujud
Ibn Arabi is most often characterized in Islamic texts as the originator of the doctrine of wahdat al-wujud, however, this expression is not found in his works and the first who employed this term was perhaps, in fact, the Andalusian mystical thinker Ibn Sabin. Although he frequently makes statements that approximate it, it cannot be claimed that "Oneness of Being" is a sufficient description of his ontology, since he affirms the "manyness of reality" with equal vigor.
In his view, 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 (mutlaq), 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.
Since wujūd is nondelimited, it is totally different from everything else. Whatever exists and can be known or grasped is a delimitation and definition, a constriction of the unlimited, a finite object accessible to a finite subject. In the same way, wujūd's self-consciousness is nondelimited, while every other consciousness is constrained and confined. But we need to be careful in asserting wujūd's nondelimitation. This must not be understood to mean that wujūd is different and only different from every delimitation. The Shaykh is quick to point out that wujūd's nondelimitation demands that it be able to assume every delimitation. If wujūd could not become delimited, it would be limited by its own nondelimitation. Thus "He possesses nondelimitation in delimitation" Or, "God possesses nondelimited wujūd, but no delimitation prevents delimitation. Rather, He possesses all delimitations, so He is nondelimited delimitation, since no single delimitation rather than another rules over Him.... Hence nothing is to be attributed to Him in preference to anything else" . Wujūd must have the power of assuming every delimitation on pain of being limited by those delimitations that it cannot assume. At the same time, it transcends the forms by which it becomes delimited and remains untouched by their constraints.
Only He who possesses Being in Himself (wujûd dhâtî) and whose Being is His very essence (wujûduhu 'ayn dhâtihi), merits the name of Being. Only God can be like that.
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-haqq), the only reality that is real in every respect. On lower levels, wujūd is the underlying substance of "everything other than God" (mā siwā Allāh)—which is how Ibn Arabi and others define the "cosmos" or "universe" (al-'ālam). 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' (asma') or 'attributes' (sifat), 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.
For the creatures, Being is not part of their essence. So a creature does not own its being, that it can never be independent in itself . In this sense, the created does not deserve the attribution of Being. Only God is Being, and all the rest is in reality a possibility (imkân), a relative, possible non-existence.
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).
Wahdat-ul-Wujood spread through the teachings of the Sufis like Qunyawi, Jandi, Tilimsani, Qayshari, Jami etc. It is also associated with the Hamah Ust (Persian meaning "He is the only one") philosophy in South Asia. Sachal Sarmast and Bulleh Shah two Sufi poets from India, were also ardent followers of Wahdat-ul-Wujood.
Today, some Sufi Orders, notably the Bektashi sect and the non-traditional sects of Universal Sufism, place much emphasis on the concept of wahdat-ul-wujood.
Read more about this topic: Wahdat Al-Wajood