Risala fi Usul al-Din

Risala fi Usul al-Din (Treatise on the Principles of Religion) is a theological treatise written by the Hanbali scholar Ibn Taymiyya (661–728 AH / 1263–1328 CE) in response to a series of inquiries regarding the permissibility, epistemic requirements, and scope of investigating the fundamentals of Islamic theology Risala fi Usul al-Din+1.

Background and Inquiries

The work was composed as a formal response to questions posed to Ibn Taymiyya concerning theological discourse (al-kalam): whether it is permissible to delve into theological issues of usul al-din that were not explicitly reported from the Prophet Muhammad ﷺ; whether such inquiry is obligatory if deemed permissible; and whether an investigator (mujtahid) may rely on strong probability (ghalabat al-zann) or is strictly required to attain conclusive certainty (al-qat'), as well as whether failing to reach certainty constitutes an unbearable legal obligation (taklif ma la yutaq) Risala fi Usul al-Din.

Content and Method

Revelation and Rational Proofs

Ibn Taymiyya divides usul al-din into two primary categories:

1. Doctrinal issues (masa'il) that must be believed in speech or in speech and action—such as divine unity (tawhid), divine attributes (sifat), divine decree (qadar), prophecy (nubuwwa), and the afterlife (ma'ad) Risala fi Usul al-Din.
2. The proofs and indications (dala'il) establishing these doctrines Risala fi Usul al-Din+1.

He argues that all necessary theological doctrines and their decisive proofs were fully expounded in the Quran and the Sunnah Risala fi Usul al-Din. He critiques speculative theologians (mutakallimun) and philosophers who claimed that scriptural texts yield knowledge only by way of bare narrative reports (khabar mujarrad) while their epistemic foundations rest strictly on pure rational deductions Risala fi Usul al-Din. Instead, he asserts that the Quran provides rational arguments and analogies of the superior degree (qiyas al-awla), establishing the necessity of divine perfection, absolute transcendence, and the possibility and reality of bodily resurrection Risala fi Usul al-Din+1.

Dialectical Terminology and Theological Methods

Addressing the terminology introduced by dialectical theologians—such as substance (jawhar), accident ('arad), and body (jism)—Ibn Taymiyya explains that the early generations (salaf) and leading jurists censured these terms not merely for their coined phrasing, but because they embodied ambiguous and erroneous concepts when applied to divine realities Risala fi Usul al-Din+1. He highlights how the kalam proof of the universe's temporal origination via accidents (huduth al-a'rad) led various factions into corrupt conclusions, such as negating divine attributes, denying the beatific vision, or asserting the eventual cessation of Paradise and Hell Risala fi Usul al-Din+1. Nevertheless, he affirms that employing technical vocabularies to convey sound scriptural meanings when addressing different linguistic or intellectual groups is permissible and beneficial out of necessity Risala fi Usul al-Din+1.

Epistemic Obligations and Excuses

Ibn Taymiyya clarifies that scriptural prohibitions primarily target speaking about God without knowledge, disputing falsehood, and sectarian schism, rather than seeking genuine knowledge of religious foundations Risala fi Usul al-Din+1. In determining legal obligation, he maintains:

• General belief in prophetic revelation is an individual duty (fard 'ayn) upon every Muslim, whereas detailed theological understanding is a collective duty (fard kifaya) proportional to an individual's intellectual capacity and role Risala fi Usul al-Din.
• The claim of certain theologians that definitive certainty (qat') is universally required across all theological matters is mistaken; an earnest scholar who exerts sincere effort (ijtihad) but cannot attain conclusive certainty is excused for inadvertent errors and rewarded for holding a strong, truth-conforming conviction within his capacity Risala fi Usul al-Din+2.

Critique of Unbearable Obligation and Fatalism

Concluding with the question of capacity, Ibn Taymiyya rejects the generalized notion of taklif ma la yutaq (imposing obligations beyond human capacity) as an ungrounded innovation analogous to fatalistic compulsion (jabr) Risala fi Usul al-Din. He distinguishes between the capacity enabling legal command and prohibition (al-istita'a al-musahhiha li-l-fi'l) and the capacity strictly accompanying an act (al-istita'a al-muqarina li-l-fi'l), corroborating his position with statements from early scholars such as al-Awza'i preserved in Abu Bakr al-Khallal's Kitab al-Sunna Risala fi Usul al-Din+1.

Editions

The treatise has been published in separate editions, including one edited by Khalid ibn Abd al-Latif al-Sab' al-Ilmi and printed by Dar Ibn Hazm in Beirut (1415 AH / 1995 CE) Ihtisab al-Shaykh Muhamma….