At a Glance
📖 Quranic Context
Serves as a central Quranic metaphor for spiritual corruption, hypocrisy (nifaq), and doubt (shakk). It is a key concept in Quranic psychology and discussions on the state of the heart (qalb).
The presence of this 'sickness' is a barrier to receiving divine guidance and is shown to be increased by Allah as a consequence of a person's own persistence in disbelief and deception.
💭 Theological Perspective
Represents a corruption of the 'fitrah' (natural disposition). While the heart is created for faith, this disease signifies a deviation into doubt, hypocrisy, and spiritual weakness.
A core concept in 'Tazkiyat al-Nafs' (purification of the soul). It is one of the primary 'diseases of the heart' (amrad al-qalb) that requires diagnosis and spiritual treatment.
A heart afflicted with this sickness is unable to properly perceive or accept divine truth. The Quran's guidance can paradoxically increase this disease in those who are determined to reject it (as seen in Surah 9:125).
💎 Deeper Insights
The Quran's statement that Allah 'increases their disease' (فَزَادَهُمُ اللَّهُ مَرَضًا) is not an act of divine injustice, but a reflection of a spiritual law. As classical scholars explain, when a person chooses the path of hypocrisy, every new sign or revelation they reject further hardens their heart and deepens their state of spiritual sickness, making it a consequence of their own free will.
— Ibn Kathir, Al-Qurtubi
Cross-verse synthesis reveals a direct link between the 'sickness' of the heart and cowardice. In verses like 33:12 and 47:20, the disease manifests as fear and doubt during times of trial. This shows that a spiritually sick heart lacks the certainty (yaqin) and trust (tawakkul) needed for courage and steadfastness.
— Sayyid Qutb, Ibn al-Qayyim