The concept of Sukūn al-Qalb, or tranquility of the heart, stands at the very heart of Islamic spirituality and Sufi thought. It represents not merely an emotional calm, but a profound spiritual state of inner stillness, certitude, and deep-rooted contentment that arises from a living relationship with Allah. This state has been beautifully articulated by early Sufi masters, particularly by Abu Nasr al-Sarraj in his renowned work Kitab al-Luma. In this work, he transmits a powerful statement from Ibn Ata, who, when asked about the moment at which tranquility of the heart is bestowed, replied that it occurs when a person realizes Haqq al-Yaqīn (ultimate certainty), which he identifies with the Qur’an. Thereafter, the seeker is granted ‘Ilm al-Yaqīn (knowledge of certainty), and then ascends to ‘Ayn al-Yaqīn (vision of certainty), and upon reaching this stage, the heart is endowed with tranquility.
This explanation reflects a profound spiritual epistemology within Islam, where knowledge is not limited to intellectual understanding but unfolds through a dynamic process of realization and transformation. The Qur’an itself provides the foundation for these stages of certainty. Allah declares: “No! If you only knew with knowledge of certainty (‘ilm al-yaqīn)” (Surah al-Takathur 102:5), followed by “Then you will surely see it with the eye of certainty (‘ayn al-yaqīn)” (102:7), and finally, “Indeed, this is the true certainty (haqq al-yaqīn)” (Surah al-Waqi‘ah 56:95). These stages illustrate the journey of the believer from knowing about truth, to witnessing it inwardly, and ultimately to becoming fully immersed in it. It is at this culminating stage that the heart achieves Sukūn, a tranquility that is unshaken by external circumstances.
The Qur’an repeatedly emphasizes that true tranquility is found only in the remembrance of Allah. One of the most profound verses in this regard states: “Verily, in the remembrance of Allah do hearts find rest” (Surah al-Ra‘d 13:28). This verse captures the essence of Sukūn al-Qalb, indicating that the human heart, by its very nature, remains restless until it connects with its Creator. The restlessness of the heart is not a deficiency but a sign of its divine origin, constantly yearning for ultimate truth and meaning. Thus, remembrance (dhikr) becomes the means by which the heart returns to its natural state of peace.
Closely related to this concept is the Qur’anic term sakīnah, which refers to a divine tranquility sent down by Allah into the hearts of believers. Allah says: “He it is Who sent down tranquility (sakīnah) into the hearts of the believers that they may increase in faith along with their faith” (Surah al-Fath 48:4). This verse indicates that tranquility is ultimately a divine gift, granted to those whose hearts are receptive through faith, sincerity, and submission. It often descends in moments of hardship, strengthening the believer and enabling them to remain steadfast in the face of trials.
The teachings of the Prophet Muhammad ﷺ further deepen our understanding of this inner tranquility. He emphasized that true richness is not material but spiritual, stating: “Richness is not having many possessions, but true richness is the richness of the soul” (Sahih al-Bukhari and Sahih Muslim). This richness of the soul is synonymous with Sukūn al-Qalb, reflecting a state of inner sufficiency and independence from worldly fluctuations. In another hadith, the Prophet ﷺ said: “Whoever is pleased with Allah as his Lord, Islam as his religion, and Muhammad as his Prophet has tasted the sweetness of faith” (Sahih Muslim). This sweetness is inseparable from tranquility, as it reflects a heart that has fully accepted and internalized divine guidance.
“Sukūn al-Qalb (Tranquility of the Heart) is a spiritual progression from knowledge to certain faith. By balancing love for the Divine with steadfast trust and constant remembrance, the heart becomes an unshakable sanctuary. Grounded in the Quranic promise of steadfastness, this state transforms a person into a source of light, free from the anxieties and grief of the world.”
The signs of a tranquil heart, as described in the statement transmitted by Ibn ‘Ata’, are both subtle and profound. Such a heart is characterized by contentment with Allah’s decree, maintaining a balance between love and reverence for Him, and placing complete trust in His wisdom. The Qur’an beautifully expresses this attitude: “Perhaps you dislike something which is good for you, and love something which is bad for you. Allah knows, and you do not know” (Surah al-Baqarah 2:216). This verse teaches that tranquility arises when the believer transcends personal preferences and aligns their will with divine wisdom.
Another essential characteristic of Sukūn al-Qalb is reliance upon Allah (tawakkul). The Qur’an states: “And whoever relies upon Allah – then He is sufficient for him” (Surah al-Talaq 65:3). This reliance is not passive resignation but an active trust that combines effort with faith. The tranquil heart does not become overwhelmed by fear or anxiety, because it recognizes that all affairs are ultimately in the hands of Allah. Such a heart remains firm and composed, even in the face of uncertainty.
The great scholars and spiritual masters of Islam have elaborated extensively on this state. Al-Ghazali, in his monumental work Ihya’ ‘Ulum al-Din, describes the heart as a mirror that becomes rusted through sin and heedlessness but is polished through remembrance and repentance. When purified, it reflects divine light, leading to clarity, serenity, and tranquility. Similarly, Ibn Taymiyyah expressed a profound understanding of inner peace when he said: “My paradise is in my heart; wherever I go, it goes with me.” This statement encapsulates the essence of Sukūn al-Qalb as an inward state that remains unaffected by external conditions.
The Sufi master Junayd of Baghdad defined tranquility as the stillness of the heart under the flow of divine decree, emphasizing complete submission and acceptance. Likewise, Shah Waliullah Dehlawi highlighted that true peace emerges when the human soul aligns itself with divine wisdom, transcending the distractions and attachments of the material world.
Central to all these perspectives is the role of the Qur’an as both guidance and healing. Allah declares: “We send down in the Qur’an that which is a healing and a mercy for the believers” (Surah al-Isra 17:82). The Qur’an addresses not only the intellectual but also the emotional and spiritual dimensions of the human being. Its recitation, reflection, and implementation gradually transform the inner state of the believer, replacing doubt with certainty, fear with hope, and restlessness with peace.
In the modern world, where human beings are often overwhelmed by anxiety, constant distraction, and an unending pursuit of material success, the concept of Sukūn al-Qalb becomes particularly relevant. Despite unprecedented technological advancement, true inner peace remains elusive because it cannot be attained through external means alone. The Sufi tradition reminds us that tranquility is an inward journey, rooted in faith, remembrance, and conscious awareness of Allah.
Ultimately, Sukūn al-Qalb is both a journey and a destination. It begins with knowledge, deepens through experience, and culminates in certainty. It manifests in a heart that is content with Allah, balanced in love and reverence, steadfast in trust, and constant in remembrance. Such a heart becomes a sanctuary of peace, untouched by the fluctuations of the world. As the Qur’an assures: “Indeed, those who have said, ‘Our Lord is Allah’ and then remained steadfast—upon them shall be no fear, nor shall they grieve” (Surah Fussilat 46:13). This is the promise of tranquility, a divine gift that transforms the human heart into a source of light, faith, and unwavering serenity.
(The author a veteran academician is a former Professor and Head Department of Islamic Studies, Kashmir University. The views, opinions and conclusions expressed in this article are those of the author and aren’t necessarily in accord with the views of “Kashmir Horizon”)
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