The term cosmology (from the Greek kósmos, “order,” “world,” “universe,” and lógos, “discourse,” “study,” or “science”) designates the study of the cosmos considered as a whole. It seeks to understand the origin, structure, organization, and purpose of the universe. Depending upon the period and tradition, cosmology may take a scientific, philosophical, religious, or metaphysical form. It thus constitutes a reflection upon the world in its totality and upon the principles that account for it.

More specifically

In traditional civilizations, cosmology is never reduced to a merely physical description of the universe. It expresses a comprehensive vision of reality in which the visible world appears as the reflection or manifestation of an invisible order. The structures of the cosmos therefore possess a symbolic significance no less important than their material reality.

Among the Presocratic philosophers, cosmology seeks to discover the archē, the first principle from which the world is constituted. Whether identified with water, air, fire, or the apeiron, the aim is to uncover the unity underlying the diversity of phenomena.

For Plato, cosmology is inseparable from metaphysics. In the Timaeus, the sensible universe appears as the image of an intelligible model. The cosmos is a unique living being, ordered according to mathematical principles and animated by a World Soul. Every cosmology is therefore necessarily symbolic, since it describes a reality that points beyond itself to a higher order.

For Aristotle, the cosmos is conceived as a hierarchical and purposive whole. Each being occupies a determinate place and tends toward its own perfection. The universe thus constitutes a coherent order whose unity rests upon the Unmoved Mover.

The Neoplatonic tradition deepens this perspective. For Plotinus, the cosmos proceeds from the One through various degrees of emanation. The sensible world reflects higher levels of reality and manifests, in its own manner, the perfection of its source. Cosmology thereby becomes an interpretation of the very structure of being.

The great religious traditions likewise developed their own cosmologies. Biblical cosmology, Hindu cosmology, Buddhist, Islamic, and Chinese cosmologies do not merely seek to explain how the world functions; they situate the human being within a meaningful cosmic order oriented toward a spiritual destiny.

Beginning in the modern period, cosmology gradually became an autonomous scientific discipline. The work of Nicolaus Copernicus, Galileo Galilei, Johannes Kepler, and Isaac Newton led to a mathematical representation of the universe founded upon the laws of motion and gravitation.

Contemporary cosmology studies the history and structure of the universe through astrophysics and general relativity. Models such as the Big Bang, cosmic expansion, dark matter, and dark energy seek to describe the evolution of the observable universe from its earliest moments. This approach produces highly precise knowledge but remains limited to the domain of measurable phenomena.

The distinction between scientific cosmology and metaphysical cosmology therefore becomes essential. The former studies the mechanisms of the observable universe; the latter inquires into the principles that make the existence of such a universe possible. The two approaches need not exclude one another, since they address different questions.

From a metaphysical perspective, cosmology remains inseparable from the question of meaning. The cosmos is not merely a collection of phenomena governed by laws; it appears as a manifestation of deeper principles of which it is the visible expression. The world thus becomes not only an object to be observed but also a symbol to be interpreted.

This symbolic dimension has often been emphasized by traditional metaphysics. As Jean Borella argues, the universe possesses an intrinsic “iconic” function: it reveals, through its very structure, realities that transcend it. Likewise, Wolfgang Smith has insisted that ancient cosmologies should not be read as primitive scientific theories but as symbolic expressions of metaphysical truths.

Cosmology thus stands as one of the privileged meeting points of science, philosophy, religion, and metaphysics. It seeks to understand not only how the universe is organized, but also what it reveals about reality itself and about humanity’s place within the order of the world.

Further reading

  • Plato, Timaeus;
  • Aristotle, On the Heavens (De Caelo);
  • Plotinus, Enneads;
  • Nicolaus Copernicus, De revolutionibus orbium coelestium;
  • Johannes Kepler, Harmonices Mundi;
  • Isaac Newton, Philosophiae Naturalis Principia Mathematica;
  • Albert Einstein, writings on General Relativity;
  • Wolfgang Smith, The Wisdom of Ancient Cosmology;
  • Wolfgang Smith, Cosmos and Transcendence;
  • Jean Borella, Symbolism and Reality (Symbolisme et Réalité);
  • Jean Borella, The Crisis of Religious Symbolism (La crise du symbolisme religieux);
  • Bruno Bérard, Metaphysics and Cyclology (Métaphysique et cyclologie);
  • Bruno Bérard, Metaphysics for Everyone, Paris, L’Harmattan, 2021 (It. trans. Sui sentieri della metafisica; Sp. trans. ¿Qué es la metafísica?; Ger. trans. Was ist Metaphysik? Zwischen Ambition und Wirklichkeit).

Note: Cosmology is not reducible to the question of the physical origin of the universe. In its deepest sense, it seeks to understand the order of the world as the manifestation of a principle. Scientific cosmology describes the observable universe; metaphysical cosmology asks about the very reasons for its existence and about the meaning it may hold for human intelligence. In this broader perspective, the cosmos appears not merely as a physical system but as a reality that invites contemplation, interpretation, and wonder.