In the heart of the enlightened man or woman there is a window opening on the realities of the spiritual world, so that he or she knows what produces wretchedness or happiness in the soul…
Abu Hamid al-Ghazali

What Produces Sickness or Health
Topic: Self-Cultivation & Health
In the heart of the enlightened man or woman there is a window opening on the realities of the spiritual world, so that he or she knows, not by hearsay or traditional belief, but by actual experience, what produces wretchedness or happiness in the soul just as clearly and decidedly as the physician knows what produces sickness or health in the body. He recognizes that knowledge of God and worship are medicinal, and that ignorance and sin are deadly poisons for the soul. Many even so-called “learned” men, from blindly following others’ opinions, have no real certainty in their beliefs regarding the happiness or misery of souls in the next world, but he who will attend to the matter with a mind unbiased by prejudice will arrive at clear convictions on this matter.
Abū Ḥāmid Muḥammad ibn Muḥammad al-Ghazālī, commonly known as Al-Ghazali, was a figure of towering intellect and deep spiritual insight. Born in Persia around 1058, he left an indelible mark on Sunni Islam as one of its most influential philosophers, theologians, jurists, and mystics. His profound understanding of the Islamic tradition, coupled with a relentless quest for spiritual truth, contributed to a body of work that transcended the boundaries of time and geography, embedding him deeply within the history and consciousness of the Islamic world. A scholar of immense stature, he was well-versed in the complexities of Islamic jurisprudence, the intricacies of philosophy, and the subtle depths of mysticism. His multifaceted genius is evident in his ability to interweave these diverse strands of knowledge into a cohesive vision of the faith.
Within the Islamic tradition, Al-Ghazali holds the distinct honor of being recognized as a Mujaddid, a renewer of the faith. The concept of the Mujaddid comes from a prophetic hadith stating that God sends such a figure once every century to revive the faith of the ummah - the global community of Muslims. Al-Ghazali was seen as embodying this role, as he worked tirelessly to elucidate the teachings of Islam, addressing both the challenges of his time and the timeless questions of human existence. His writings, imbued with a profound wisdom and a deep love for God, continue to guide and inspire Muslims around the world, aiding them in their quest to understand and live out their faith in a holistic manner.
Such was the impact of Al-Ghazali's works and the respect he commanded from his contemporaries that he was bestowed with the honorific title "Proof of Islam" (Hujjat al-Islam). This title is a testament to his role as a beacon of knowledge and spirituality, illuminating the path for seekers of truth in their journey towards God. Despite his passing on December 19, 1111, the legacy of Al-Ghazali continues to shine brightly, his teachings serving as a bridge between the intellectual and spiritual dimensions of Islam, guiding generations of believers towards a deeper, more meaningful understanding of their faith.
The Alchemy of Happiness
Al-Ghazali, Abu Hamid. The Alchemy of Happiness. Translated by Henry A. Homes, Munsell, 1873. [Wilson, Andrew, editor. World Scripture II. Universal Peace Federation, 2011,] pp. 727-728
Abu Hamid al-Ghazali
Theme: Healing

About This Abu Hamid al-Ghazali Quotation [Commentary]
Abu Hamid al-Ghazali describes the enlightened heart as having “a window opening on the realities of the spiritual world.” Through this opening, a person knows “not by hearsay or traditional belief, but by actual experience” what produces “wretchedness or happiness in the soul.” This is knowledge inwardly experienced rather than simply received from others. Abu Hamid al-Ghazali compares such discernment to the physician who knows “what produces sickness or health in the body.” In the same way, a person can learn to recognize what harms the soul and what restores its well-being.
Abu Hamid al-Ghazali makes the connection to healing clear: “knowledge of God and worship are medicinal,” while “ignorance and sin are deadly poisons for the soul.” His comparison with medicine gives spiritual life the seriousness of a matter of health. Knowledge of God is joined with worship and “actual experience,” through which a person learns to distinguish what brings “happiness” to the soul from what brings “wretchedness.” Spiritual healing thus depends on recognizing what is medicinal for the inner life and what causes harm.
Abu Hamid al-Ghazali concludes by returning to the difference between borrowed belief and direct understanding. He cautions against “blindly following others’ opinions,” because even “learned” people may lack “real certainty.” Instead, he calls for attending to the matter “with a mind unbiased by prejudice.” His words bring heart, mind, and experience together: the heart opens to “the realities of the spiritual world,” a person recognizes what is “medicinal” or poisonous to the soul, and hearsay gives way to a clearer knowledge of what leads toward spiritual health and happiness.
Additional Commentary
In “The Alchemy of Happiness,” Al Ghazali explores the nature of the human soul and its journey towards spiritual enlightenment. The specific quotation, “In the heart of the enlightened man there is a window opening on the realities of the spiritual world, so that he knows what produces wretchedness or happiness in the soul,” reflects Al Ghazali’s attempt to reconcile Islamic teachings with Aristotelian logic. This work emphasizes the importance of understanding the spiritual causes of happiness and wretchedness, suggesting that true enlightenment involves a deep awareness of the spiritual dimensions of life.
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