Al-Arba'in fi Usul al-Din (Dar al-Minhaj) الاربعين في اصول الدين

Al-Arba'in fi Usul al-Din (الأربعين في أصول الدين – The Forty Principles of the Fundamentals of Religion) is one of the finest concise works of Imam Abu Hamid al-Ghazali (d. 505 AH / 1111 CE), the celebrated Hujjat al-Islam ("Proof of Islam"). In this masterpiece, al-Ghazali presents a comprehensive guide to Islamic belief, worship, spiritual purification, and moral refinement.

The edition published by Dar al-Minhaj (Jeddah, Saudi Arabia) is recognized for its meticulous editing, careful manuscript comparison, and elegant typography, making it one of the finest modern editions of this classic. Dar al-Minhaj is renowned for producing high-quality critical editions (tahqiq) of classical works on Shafi'i jurisprudence, Ash'ari theology, and Islamic spirituality.

Context and Purpose

Imam al-Ghazali composed Al-Arba'in fi Usul al-Din as a concise summary and companion to his magnum opus, Ihya' 'Ulum al-Din (The Revival of the Religious Sciences). In the introduction, he explains that the path to the Hereafter rests upon two foundations: knowledge ('Ilm) and righteous action ('Amal). To guide the seeker along this path, he distilled forty essential principles that combine sound belief with practical devotion and spiritual discipline.

The Structure of the Book

The work is organized into four quarters, each containing ten principles, for a total of forty.

Quarter I: Foundations of Faith and Knowledge of Allah (الأصل الأول: في المعارف العشرة)

The opening section summarizes the essential doctrines of Sunni creed, particularly as articulated in the Ash'ari tradition. It discusses:

1. The Divine Essence (Dhat)
2. Divine Transcendence (Taqdis)
3. Divine Power (Qudrah)
4. Divine Knowledge ('Ilm)
5. Divine Will (Iradah)
6. Divine Hearing and Sight (Sam' wa Basar)
7. Divine Speech (Kalam)
8. Divine Actions (Af'al)
9. The Last Day and Resurrection
10. Prophethood (Al-Nubuwwah)

Quarter II: Outward Acts of Worship (القسم الثاني: في الأعمال الظاهرة)

The second section explains the principal acts of worship, emphasizing both their legal rulings and their inward spiritual purposes:

1. Prayer (Salah)
2. Almsgiving (Zakah)
3. Fasting (Sawm)
4. Pilgrimage (Hajj)
5. Recitation of the Qur'an
6. Remembrance of Allah (Dhikr)
7. Seeking Lawful Livelihood
8. Fulfilling the Rights of Fellow Muslims and Good Companionship
9. Enjoining Good and Forbidding Evil
10. Following the Sunnah of the Prophet ﷺ

Quarter III: Purifying the Heart from Destructive Traits (القسم الثالث: في تزكية القلب عن رذائل الأخلاق)

Drawing upon the Muhlikat ("destructive traits") of the Ihya', al-Ghazali examines the spiritual diseases that hinder one's journey to Allah:

1. Gluttony
2. Sins of the Tongue
3. Anger
4. Envy
5. Miserliness and Love of Wealth
6. Love of Status and Reputation
7. Attachment to the World
8. Pride
9. Self-Admiration
10. Ostentation (Riya')

Quarter IV: Adorning the Soul with Saving Virtues (القسم الرابع: في الأخلاق المنجيات)

The final quarter presents the Munjiyat ("saving virtues") that cultivate closeness to Allah and spiritual excellence:

1. Repentance (Tawbah)
2. Fear of Allah (Khawf)
3. Asceticism (Zuhd)
4. Patience (Sabr)
5. Gratitude (Shukr)
6. Sincerity and Truthfulness (Ikhlas and Sidq)
7. Reliance upon Allah (Tawakkul)
8. Love of Allah (Mahabbah)
9. Contentment with Divine Decree (Rida)
10. Remembrance of Death and the Hereafter

The Dar al-Minhaj Edition

The Dar al-Minhaj edition is especially valued for its scholarly care and production quality. Its distinguishing features include:

• Critical Editing: A carefully established text based on the comparison of multiple manuscript sources, correcting many errors and omissions found in older commercial editions.
• Hadith Verification (Takhrij): Detailed footnotes identifying the sources and authenticity of the hadiths cited by Imam al-Ghazali, whose works often include narrations of varying levels of authenticity for the purpose of spiritual encouragement.
• Superior Typography: Clear Arabic typesetting with complete vowelization (tashkil), generous spacing, and high-quality cream-colored paper, making the text both attractive and easy to study.

Summary

Al-Arba'in fi Usul al-Din is a masterfully organized curriculum for spiritual growth and self-rectification. It brings together the three essential dimensions of the Islamic tradition—'Aqidah (creed), Fiqh (sacred law), and Tazkiyah (spiritual purification)—illustrating the classical Sunni understanding that sound belief, righteous action, and refinement of the heart are inseparable components of the path to Allah. Compact yet comprehensive, it remains one of Imam al-Ghazali's most accessible and enduring works.