The three forms of Love: Eros, Philia, and Agape Explained

Why do we love? From passion to lasting connection, this article explores the three faces of love through the lens of the brain and the mind.

Contemporary neuroscience seeks to elucidate love through its biological correlates: activation of dopaminergic circuits in passionate love, the role of oxytocin and vasopressin in attachment, and the involvement of brain structures such as the ventral striatum, amygdala, and prefrontal cortex (Fisher, 2004; Panksepp, 1998). These advances have significantly deepened our understanding of the neurobiological mechanisms underlying relational pleasure, bonding, and emotional motivation.

However, as valuable as this approach may be, it remains incomplete. It describes the conditions that make love possible without exhausting its meaning or complexity. Human love cannot be reduced to brain chemistry alone; it is also embedded in language, personal history, fantasy, and absence.

This is precisely where psychoanalysis offers critical insight. Through the concept of libido, Sigmund Freud conceptualizes love as an investment of psychic energy directed toward an object, capable of multiple transformations depending on the nature of the relationship (Freud, 1915). The unity of the libido does not preclude the diversity of its expressions; it unfolds in profoundly different ways depending on the registers in which it operates.

In this respect, the Greek tripartite distinction of love, eros, philia, and agape, provides a particularly fertile framework. Rather than constituting separate categories, these forms can be understood as differentiated modalities of a single libidinal movement: eros as desire marked by lack and idealization, philia as a relationship grounded in recognition and reciprocity, and agape as a sublimated transformation of libido expressed through giving. This perspective allows us to integrate insights from neuroscience, philosophy, and psychoanalysis into a broader understanding of love.

Eros: love as lack … desire, idealization, and illusion

Eros represents the most intense and immediately recognizable form of love: desire, passion, and the longing for the other. In The Symposium, Plato introduces, through the myth of the androgyne, a foundational conceptualization of desire: human beings, separated from their original unity, are condemned to seek what they lack. Love thus emerges as a tension toward a lost completeness, driven by a structural absence.

This logic of lack is further developed by Sigmund Freud, who demonstrates that passionate love involves a mechanism of idealization. In On Narcissism (1914), he explains that the beloved object is invested as an ideal of the self, becoming the bearer of qualities often rooted in early identifications. Erotic love is therefore deeply intertwined with narcissism: to love is also to love, in the other, a transformed, magnified, or completed version of oneself.

Jacques Lacan radicalizes this perspective by situating love within the structures of language and lack. The object of love is never encountered in its pure reality; it is shaped by a network of signifiers and projections. His famous assertion, “to love is to give what one does not have,” reveals a fundamental truth: love does not fill the void; it mobilizes it and sets it in motion within the relationship.

From a more disenchanted philosophical perspective, Arthur Schopenhauer interprets this intensity as an illusion serving the will to live. The individual believes they are pursuing happiness, while in reality they are caught in a biological logic that transcends them. This pessimistic view of human existence, oscillating “like a pendulum between suffering and boredom” (The World as Will and Representation), places passionate love in a singular position: a temporary illusion of meaning that suspends boredom while often preparing new forms of suffering.

Neuroscience complements this view by showing that romantic love activates neural circuits similar to those involved in addiction, particularly dopaminergic reward systems (Fisher, 2004). Eros thus stands at the crossroads of biology, psyche, and imagination: an experience structured by lack, sustained by illusion, and intensified by brain chemistry.

🔗Read also: Masculine and feminine emotional worlds

Philia: love as friendship… recognition, reciprocity, and intersubjectivity

In contrast to the intensity of eros, philia introduces a different mode of loving connection: one grounded in mutual recognition and enduring bonds. In the Nicomachean Ethics, Aristotle distinguishes several forms of friendship, identifying the highest as one based on virtue and reciprocity. The friend is described as “another self,” not in a fusion of identities, but in a recognition of genuine otherness.

Baruch Spinoza extends this idea, suggesting that encounters with others can generate joy when they enhance our power to act. Love, in this sense, is no longer dependence or illusion, but a co-construction of existence. Similarly, Michel de Montaigne emphasizes the singularity of friendship, irreducible to causal explanation, rooted instead in a profound affinity that escapes utilitarian logic.

From a psychoanalytic perspective, philia requires a significant transformation in one’s relation to the object. Donald Winnicott shows that the capacity for mature relationships depends on recognizing the other as external and independent. This entails relinquishing infantile omnipotence and accepting alterity. Love becomes possible not as projection, but as genuine encounter.

In this mode, libido does not disappear; it stabilizes and becomes regulated. It is no longer dominated by intensity and idealization but supports a durable bond. Neurobiologically, this corresponds to a shift from reward and novelty systems toward circuits involved in attachment and security, including oxytocin pathways and prefrontal regulation, marking a transition from passion to relational continuity.

Agape: unconditional love… sublimation and giving

Agape represents a form of love that transcends both desire and reciprocity. It is characterized by giving, by an orientation toward the other that does not depend on what they can offer in return. Rooted in the Christian tradition, this conception breaks with the conventional economy of emotional exchange: to love is no longer to possess or even to share, but to give.

In psychoanalytic theory, this transformation can be understood through the concept of sublimation. Freud defines it as the redirection of libidinal energy toward non-sexual yet socially and symbolically valued aims (Freud, 1905). The drive does not disappear; it is transformed, displaced, and reoriented toward more elaborated forms of investment.

Agape thus involves a certain transcendence of narcissism. Whereas eros heavily engages self-image, and philia maintains structuring reciprocity, agape opens a relationship in which the other is valued independently of utility or gratification. Parental love offers a paradigmatic example, grounded in an investment that exceeds pleasure and exchange.

Here, libido acquires a transpersonal dimension. It no longer serves solely the subject’s satisfaction but participates in a broader ethical, social, or spiritual dynamic. Agape does not signify the disappearance of desire, but its transformation into a different economy: one of giving, in which even loss becomes a condition for connection.

🔗Discover more: The eternal memory: When love defies forgetting

The three Greek forms of love, eros, philia, and agape, can be understood as distinct modalities of a single libidinal movement. While neuroscience describes their biological foundations, psychoanalysis restores their depth by articulating desire, lack, and symbolic structure.

Like light refracted through a prism, libido manifests as desire and idealization in eros, as recognition and stability in philia, and as sublimation in agape. These forms are not mutually exclusive; they can coexist within romantic relationships.

Nevertheless, certain distinctions remain essential. Sexual desire, often associated with Aphrodite, is inherently fluctuating and partially ephemeral. Passionate or purely sexual love cannot alone sustain a lasting bond.

Enduring relationships are not those that maintain constant erotic intensity, but those that successfully cultivate philia through recognition, complicity, and stability, alongside agape as the capacity for giving and self-transcendence. It is within this dynamic interplay that a resilient and lasting love takes shape.