Member of the IDEO and PhD student in Islamic studies
icon-calendar May 22, 2018
For Heidegger (1889‒1976), if metaphysics failed in its project, it is because it identified the “Being” with God, transforming into a sterile onto-theology. This description undoubtedly applies to Avicenna (d. 428/1037), for whom the proof of God’s existence finds itself in the necessity that there be an end to the chain of causalities. God is the necessary Being who has no cause other than himself.
This proof of the existence of God is repugnant to Ibn Taymiyya (d. 728/1328), not only because it is rooted in logical human tools, incapable by definition of reaching the divine being, but also because it is valid only inside the world of logic, without saying anything about the actual existence of God.
Among all of Ibn Taymiyya’s philosophical refutations, his refutation of al-Siǧistānī (d. after 361/971) in Darʾ al-taʿāruḍ bayna al-ʿaql wa-l-naql is particularly interesting. In his Kitāb al-maqālīd al-malakūtiyya, al-Siǧistānī criticizes the Avicennian definition of the existence of God as the ‘necessary being’ (wāǧib al-wuǧūd) because it makes God a composite being, as he would share the fact of “being” with his creatures, yet would have his own kind of being, the “necessary being.” Al-Siǧistānī then explains that the “being” of God has nothing to do with the “being” of creatures. Ibn Taymiyya criticizes this position, which ultimately amounts to saying that God does not exist, because we cannot say of him that he is nor that he isn’t, which is contradictory according to the laws of logic itself.
For Ibn Taymiyya, this contradiction is based on an error shared by all philosophers, namely that they believe that existence, which is only a concept, has real existence. “Existence,” like all universals, does not exist outside our mind. It is meaningless to seek to demonstrate God by a conceptual way that can only reach concepts without real existence; we must find a direct way. However, precisely, man knows that God exists because of an innate natural faculty, the fiṭra. There is no need to mediate concepts to know that God exists. In addition, if someone refuses to recognize that God exists, it is simply because his fiṭra is sick.
The problem with such a solution (a nominalist one for sure) is that it cannot be refuted. Anyone who questions Ibn Taymiyya’s thinking would only prove that his fiṭra is deficient.