Abstract
The present study conducts a comparative analysis of the concepts of pleasure and pain in Islamic theology, from the perspective of Mu'tazilite scholar Qāḍī 'Abd al-Jabbār, and in ancient Greek philosophy, according to Epicurus. The core issue is examining the nature of pleasure and pain and their impact on human life and ethics. The method involves analyzing relevant philosophical and theological texts through critical reading and comparative analysis within both intellectual frameworks. Results show both thinkers consider pleasure and pain fundamental, perceptual human concepts, emphasizing the role of desire, aversion, benefit, and knowledge in shaping experience. Both argue, through different reasoning, that pleasure and pain are not attributable to God but are specific to transient beings. Divergently, 'Abd al-Jabbār views them as indefinable, subjective psychological states, while Epicurus interprets them as natural phenomena from atomic interactions of body and soul. 'Abd al-Jabbār emphasizes the superiority of lasting spiritual pleasures, contrasting with Epicurus's materialist view, though Epicurus also prioritizes stable mental pleasures. 'Abd al-Jabbār's ethical system is rooted in rational good/evil and an act's relation to pleasure/pain, whereas Epicurean ethics is based on moderate, natural hedonism. The study highlights the importance of these concepts for ethical philosophy and education, positing rational understanding as a guide for ethical choices.

Introduction
The concepts of pleasure and pain represent fundamental aspects of human experience that have occupied a central place in philosophical and theological inquiry throughout history. As a psychosomatic being, humans continuously encounter these two phenomena, which not only influence individual behavior but also play a crucial role in shaping moral judgments, value systems, and life goals. Understanding the nature, relationship, and implications of pleasure and pain is essential for any comprehensive ethical theory, philosophy of mind, or theological system.
This article undertakes a comparative analysis of pleasure and pain from two distinct intellectual traditions: Islamic theology as represented by the Mu'tazilite scholar Qadi 'Abd al-Jabbar (d. 1025 CE), and ancient Greek philosophy as articulated by Epicurus (341-270 BCE). These two thinkers represent markedly different worldviews—one grounded in rationalist Islamic theology with its emphasis on divine justice and human responsibility, the other rooted in materialist atomism and naturalistic hedonism. Despite these fundamental differences, both philosophers recognize the centrality of pleasure and pain in human life and ethics.
'Abd al-Jabbar, as a leading figure of the Mu'tazilite school in Baghdad, developed a sophisticated theological-ethical system in which pleasure and pain are understood as psychological perceptions rooted in desire and aversion. His approach emphasizes the role of reason, knowledge, and spiritual values in evaluating and prioritizing different types of pleasure. Epicurus, by contrast, built his philosophical system on atomistic materialism, viewing pleasure and pain as natural phenomena resulting from the atomic interactions of body and soul. For him, the pursuit of pleasure—understood as the absence of bodily pain and mental disturbance—constitutes the highest good and the foundation of ethical life.
The central research questions guiding this study include: What is the nature of pleasure and pain according to each thinker, and what hierarchy of pleasures do they propose? What role do reason and knowledge play in regulating experiences of pleasure and pain and attaining happiness? How can the ethical theories of both philosophers be reconstructed with pleasure and pain as central concepts? What philosophical arguments support their respective positions on the relationship between pleasure, pain, and the divine? By examining these questions, the research aims to reveal both commonalities and divergences between these two intellectual traditions and to assess the practical implications of their views for contemporary ethical education and decision-making.
The significance of this comparative study lies not only in its contribution to understanding two major philosophical traditions but also in its potential to enrich contemporary discussions in ethics, philosophy of mind, and moral psychology. The interaction between Eastern and Western philosophical traditions can provide valuable insights for developing more comprehensive and practical approaches to human flourishing.

Research Methodology
This study employs a comparative analytical method, utilizing critical reading and textual analysis of primary and secondary sources from both Islamic theology and ancient Greek philosophy. The primary sources include 'Abd al-Jabbar's major works, particularly his comprehensive theological summa Al-Mughnī fī Abwāb al-Tawḥīd wa al-'Adl (The Sufficient in the Chapters of Monotheism and Justice), his Sharḥ al-Uṣūl al-Khamsa (Commentary on the Five Principles), and his Qur'anic exegetical works. For Epicurus, the research draws upon his surviving letters (especially the Letter to Herodotus, Letter to Menoeceus, and Letter to Pythocles), the Principal Doctrines, and fragments preserved in later doxographical sources, including Diogenes Laertius's Lives of Eminent Philosophers and Lucretius's De Rerum Natura.
The analytical framework focuses on several key thematic dimensions: (1) the nature and definition of pleasure and pain; (2) the relationship between pleasure/pain and desire/aversion; (3) the connection between pleasure/pain and benefit/harm; (4) the hierarchy and classification of pleasures; (5) the role of reason and knowledge in regulating experiences of pleasure and pain; (6) the relationship between pleasure/pain and the divine; and (7) the ethical implications of these views.
The comparative dimension involves systematic examination of similarities and differences between the two thinkers across these thematic areas. Particular attention is given to points of convergence, such as their shared emphasis on the perceptual and experiential nature of pleasure and pain, their agreement that these phenomena cannot be attributed to God, and their recognition of the role of rational choice in ethical decision-making. Divergences are also carefully analyzed, especially regarding the ontological basis of pleasure and pain, the hierarchy of spiritual versus bodily pleasures, and the ultimate aim of human life.
The research also engages with relevant secondary literature and contemporary scholarship on both thinkers to contextualize their views within their respective intellectual traditions and to assess the continuing relevance of their insights for contemporary ethical theory and education.

Discussion
The Nature and Definition of Pleasure and Pain
The analysis reveals fundamental differences in how 'Abd al-Jabbar and Epicurus conceptualize the nature of pleasure and pain. For 'Abd al-Jabbar, pleasure and pain are primarily psychological states and inward perceptions (idrākāt nafsāniyya) that occur when a person perceives something toward which they feel desire (shahwa) or aversion (nafra). Pleasure is defined as the perception of something desirable, while pain is the perception of something repugnant. This psychological approach emphasizes the subjective, experiential dimension of pleasure and pain, grounding them in the conscious awareness and affective responses of the perceiving subject.
'Abd al-Jabbar explicitly rejects the definition of pleasure proposed by the physician-philosopher Zakariyya al-Razi, who understood pleasure as the removal of pain and the attainment of relief. The Mu'tazilite theologian argues that this definition fails to account for many instances of pleasure that occur without prior pain, such as the spiritual pleasure derived from charitable giving or the aesthetic pleasure of perceiving beauty. For 'Abd al-Jabbar, pleasure and pain are irreducibly primitive concepts that cannot be defined in terms of each other; they are immediately known through consciousness (wijdān) and require no definition beyond their experiential reality.
Epicurus, by contrast, approaches pleasure and pain from a materialist and naturalistic perspective. He understands them as natural phenomena arising from the atomic composition and interactions of body and soul. Pleasure is the natural good corresponding to the proper functioning of the organism, while pain is the natural evil resulting from atomic disturbances. For Epicurus, pleasure in its primary sense is not the active sensation of enjoyment but rather the absence of pain and disturbance—a state of tranquility (ataraxia) of the soul and freedom from bodily pain (aponia). This negative conception of pleasure distinguishes his hedonism from more crass or indulgent forms.
Despite their different ontological foundations, both thinkers agree that pleasure and pain are fundamental, perceptual concepts that play an essential role in human experience and motivation. Both emphasize that pleasure and pain are not mere abstractions but immediate experiences that guide human behavior and serve as the basis for ethical evaluation.
The Relationship between Desire, Aversion, and the Experience of Pleasure and Pain
A significant point of convergence between 'Abd al-Jabbar and Epicurus is their recognition that pleasure and pain are intimately connected to desire and aversion. For 'Abd al-Jabbar, pleasure necessarily requires desire or appetite (shahwa); a person cannot experience pleasure regarding something toward which they have no inclination. Similarly, pain requires aversion or repulsion toward the perceived object. This relationship explains why the same object may produce pleasure for one person and pain for another, or pleasure for the same person in different circumstances—because desires and aversions vary according to context, condition, and knowledge.
'Abd al-Jabbar further explains that the intensity of pleasure is proportional to the strength of the desire, and the intensity of pain is proportional to the strength of the aversion. This psychological principle has important ethical implications, as it suggests that cultivating appropriate desires and aversions through rational training and knowledge can enhance experiences of pleasure and reduce experiences of pain.
Epicurus similarly emphasizes the role of desire in the pursuit of pleasure and the avoidance of pain, though his analysis is more systematic and classificatory. He famously distinguishes between three types of desires: (1) natural and necessary desires (such as hunger and thirst), which are easy to satisfy and essential for life; (2) natural but unnecessary desires (such as desire for luxury or variety), which may be natural but are not essential and can lead to disturbance when unsatisfied; and (3) vain and empty desires (such as desire for fame, wealth, or power), which are neither natural nor necessary and inevitably lead to frustration and pain.
This classification serves as a practical guide for ethical living, directing individuals toward the satisfaction of natural and necessary desires while avoiding the pursuit of vain desires that generate anxiety and discontent. Both thinkers thus share the view that desire and aversion are not merely psychological accompaniments to pleasure and pain but are constitutive of them, and that rational regulation of desires is essential for achieving lasting satisfaction and avoiding suffering.
The Relationship between Pleasure/Pain and Benefit/Harm
Both 'Abd al-Jabbar and Epicurus recognize a close connection between pleasure and benefit (manfa'a) and between pain and harm (ḍarar). For 'Abd al-Jabbar, this relationship is so intimate that benefit is essentially identical to pleasure, and harm is essentially identical to pain. This does not mean that every beneficial thing is immediately pleasurable or that every harmful thing is immediately painful, but rather that the ultimate value of any action or object is determined by its capacity to produce pleasure or prevent pain.
'Abd al-Jabbar acknowledges that sometimes one must endure temporary pain to achieve greater or more lasting pleasure. A patient may endure the pain of medical treatment to achieve health, or a student may endure the difficulties of study to achieve knowledge and its attendant pleasures. Similarly, one may forego immediate pleasure to avoid greater future pain. This rational calculation of pleasure and pain over time is central to 'Abd al-Jabbar's ethical theory, which emphasizes the importance of reason in guiding human choices toward the greatest overall good.
Epicurus also emphasizes the importance of calculating pleasures and pains, famously stating that some pains are to be chosen if they lead to greater pleasures, and some pleasures are to be avoided if they lead to greater pains. This principle of hedonic calculus is not a crude utilitarianism but a sophisticated approach to ethical decision-making that requires wisdom, self-control, and a clear understanding of one's true needs and the consequences of one's actions. For Epicurus, the wise person is one who can correctly calculate which pleasures are worth pursuing and which pains are worth enduring, always aiming at the greatest possible freedom from disturbance and the most stable and enduring satisfaction.
The Hierarchy of Pleasures: Spiritual vs. Bodily
One of the most significant differences between the two thinkers emerges in their respective hierarchies of pleasure. 'Abd al-Jabbar, as a Mu'tazilite theologian with a strong emphasis on spiritual values and the afterlife, unequivocally affirms the superiority of spiritual and otherworldly pleasures over bodily and worldly pleasures. He argues that the pleasures of the afterlife are incomparably greater and more enduring than any worldly pleasure, precisely because they are based on a higher level of knowledge, purity, and proximity to the divine.
This superiority of spiritual pleasures is not merely quantitative but qualitative; the pleasures of paradise are described as being of a different order altogether, surpassing any earthly experience in intensity, purity, and duration. 'Abd al-Jabbar's hierarchy thus places the pleasures of divine vision, the experience of God's mercy, and the joy of eternal felicity at the highest level, followed by intellectual pleasures, with bodily and sensory pleasures occupying the lowest position.
Epicurus, despite his materialist ontology, also recognizes the superiority of mental pleasures over bodily pleasures. He argues that mental pleasures are greater than bodily pleasures because they are more durable, can be recalled through memory and anticipation, and encompass the full range of human experience, including the contemplation of past and future pleasures. The pain of the mind is also worse than the pain of the body, because the mind can suffer in the present, remember past sufferings, and anticipate future ones.
However, Epicurus's hierarchy differs from 'Abd al-Jabbar's in important respects. For Epicurus, the superiority of mental pleasures is ultimately grounded in their connection to bodily pleasure—mental pleasure is essentially thinking about bodily pleasure. Moreover, Epicurus's view is thoroughly naturalistic and this-worldly; there is no transcendent realm of spiritual pleasure beyond the natural order. The highest pleasure for Epicurus is not contemplation of the divine but the tranquil state of freedom from disturbance and pain.
The Relationship between Pleasure, Pain, and the Divine
A remarkable point of convergence between the two thinkers is their shared position that pleasure and pain cannot be attributed to God. For 'Abd al-Jabbar, this conclusion follows from his understanding of God's absolute perfection and self-sufficiency. Since pleasure involves a state of need and fulfillment, and pain involves a state of aversion and distress, neither can be predicated of God, who is free from all need, deficiency, and change. God does not experience pleasure or pain because God has no desires or aversions; God is complete in Himself, lacking nothing and suffering no deficiency.
Epicurus similarly denies that the gods experience pleasure and pain, though for different reasons. In his materialist system, the gods are made of finer atoms and enjoy a state of perfect tranquility, free from all disturbance. They are not affected by human affairs and experience no distress or dissatisfaction. Both thinkers thus affirm, from their different philosophical perspectives, that pleasure and pain are characteristics of finite, changeable, and dependent beings, not of the perfect and immutable divine.
Ethical Implications
Both 'Abd al-Jabbar and Epicurus construct ethical systems that are fundamentally based on the concepts of pleasure and pain, though they develop these systems in different directions. For 'Abd al-Jabbar, the ethical quality of actions—whether they are good (ḥasan) or evil (qabīḥ)—is determined by their relationship to pleasure and pain, mediated through reason. Actions that lead to pleasure and benefit are good, while actions that lead to pain and harm are evil. This rationalist ethics emphasizes the role of reason in discerning which actions truly produce pleasure and avoid pain, particularly in light of the distinction between temporary worldly pleasures and enduring otherworldly pleasures.
For Epicurus, ethics is essentially the art of maximizing pleasure and minimizing pain, guided by reason and knowledge of nature. The ethical life is the life that achieves the greatest possible freedom from physical pain and mental disturbance, which is the highest good. This requires wisdom in selecting among pleasures and pains, self-control in moderating desires, and knowledge of the natural limits of pleasure and the causes of pain.
Both thinkers thus share the view that reason is essential for ethical living, that pleasure and pain are the ultimate criteria for ethical evaluation, and that the good life is the one that achieves the greatest possible balance of pleasure over pain, properly understood. Their differences lie primarily in their understanding of what pleasures are truly worth pursuing and how reason should guide our choices.

Conclusion
This comparative study of pleasure and pain in the thought of 'Abd al-Jabbar and Epicurus reveals both significant convergences and fundamental divergences between these two major thinkers from the Islamic theological and ancient Greek philosophical traditions. Both recognize the centrality of pleasure and pain in human experience and motivation, the role of desire and aversion in shaping these experiences, the connection between pleasure/pain and benefit/harm, and the importance of reason and knowledge in guiding human choices toward greater well-being.
The analysis demonstrates that 'Abd al-Jabbar's Mu'tazilite approach emphasizes the psychological and spiritual dimensions of pleasure and pain, grounding them in conscious perception and linking them to a hierarchy of values that culminates in otherworldly spiritual pleasures. Epicurus's materialist approach, by contrast, explains pleasure and pain as natural phenomena arising from atomic interactions and emphasizes the achievement of tranquility and freedom from disturbance in this life. Despite these differences, both thinkers agree that pleasure and pain cannot be attributed to the divine, which is free from all need and deficiency.
The ethical implications of both views are significant for contemporary moral education and decision-making. The Mu'tazilite emphasis on reason, spiritual values, and the pursuit of enduring otherworldly pleasures offers a framework for ethical living that transcends merely material concerns, while the Epicurean emphasis on natural desires, moderation, and the avoidance of disturbance provides a practical guide to achieving tranquility in everyday life. The interaction between these traditions suggests that a richer understanding of pleasure and pain emerges from engaging with diverse philosophical perspectives, and that comparative studies can contribute to more comprehensive and nuanced approaches to ethical education and human flourishing.
The research recommends that future studies explore the reception and development of these views in later Islamic and Western thought, as well as their relevance to contemporary discussions in moral psychology, ethics, and well-being studies. The dialogue between Eastern and Western philosophical traditions on such fundamental concepts promises to enrich our understanding of human experience and to provide valuable resources for addressing the ethical challenges of the modern world.