Anaximenes: The unveiling of the cosmic breath

In the vast landscape of ancient Greek philosophy, Anaximenes is a key figure whose ideas laid the foundations for a radically different understanding of the universe. Born in Miletus, a thriving center of intellectual activity in the 6th century BC, Anaximenes became one of the most important pre-Socratic philosophers, following in the footsteps of his predecessors Thales and Anaximander. He followed in the footsteps of his predecessors Thales and Anaximander, but it was his distinctive concept of 'cosmic breath' that set him apart and exerted an indelible influence on the development of philosophical research.

Portrait: Anaximenes

Anaximenes' philosophical investigations were deeply rooted in the search for the fundamental substance underlying the diversity of the cosmos. In contrast to Thales' assertion that water was the primary element, and to Anaximander's notion of the infinite, boundless substance (apeiron), Anaximenes held that air (aer) occupied this central role. For him, air was not just the empty space we breathe, but a dynamic, omnipresent substance endowed with transformative power.

The principle of condensation and rarefaction was at the heart of Anaximenes' philosophy. He proposed that air, in its various states of condensation and rarefaction, can give rise to the multitude of phenomena observed in nature. Through condensation, air can transform into denser forms such as water, earth and ultimately solid matter. Conversely, through rarefaction it can rise and form fire and, in its highest state, the celestial bodies.


How do we know about Anaximenes?

Our knowledge of Anaximenes comes mainly from ancient sources, including the writings of other ancient philosophers, historians and commentators. Here are some of the most important sources that provide insights into Anaximenes' life and philosophy:

1 Aristotle's works: Aristotle, the ancient Greek philosopher and student of Plato, mentions Anaximenes in his writings, especially in his works on metaphysics, physics and cosmology. Aristotle discusses Anaximenes' ideas and provides critical analyses and commentaries on his philosophy that contribute to our understanding of his thought.

2 Theophrastus' "Metaphysics": Theophrastus, a student of Aristotle, wrote a work on metaphysics in which he discusses the views of earlier philosophers, including Anaximenes. While Theophrastus' work itself is lost, later commentators and compilers have preserved excerpts and summaries of it that contain valuable information about Anaximenes' philosophy.

3 Diogenes Laërtius' "Lives and Opinions of Eminent Philosophers": Diogenes Laërtius, a biographer and historian of ancient philosophy, included a biography of Anaximenes in his work. Even if some details are anecdotal or speculative, the writings of Diogenes Laërtius provide important information about Anaximenes' life and teachings.

4. fragments of Anaximenes' writings: As with many pre-Socratic philosophers, none of Anaximenes' original writings have survived in their entirety. However, we have preserved fragments of his works in later sources, such as quotations from other philosophers and references in ancient texts. These fragments offer direct insights into Anaximenes' philosophical ideas and arguments, albeit only in fragmentary form.

5 Other ancient sources: Various other ancient sources, such as historians, poets and commentators, refer to Anaximenes and his philosophy. These sources include authors such as Herodotus, Plato, Plutarch and Sextus Empiricus.

By combining these sources - ancient texts, commentaries and fragments - scholars have been able to reconstruct the life of Anaximenes, his philosophical ideas and his influence on later thinkers. Although there may be gaps and uncertainties in our understanding, the totality of the evidence allows us to recognize the importance of Anaximenes as a key figure in the history of early Greek philosophy.


This concept of "cosmic breath" clarified Anaximenes' view of the universe as a dynamic and interconnected system governed by natural processes. It was a departure from the anthropocentric interpretations of mythology, which attributed natural phenomena to the whims of capricious gods. Instead, Anaximenes attempted to fathom the underlying order and unity of the cosmos through rational research and empirical observation.

Anaximenes' ideas exerted a great influence on subsequent generations of philosophers and shaped the development of early Greek thought. His emphasis on a single, primary substance paved the way for the monistic theories of later philosophers such as Parmenides and Empedocles. Furthermore, his focus on naturalistic explanations and the importance of empirical observation anticipated the scientific methodology that would later appear in the works of Aristotle and the Hellenistic philosophers.

One of Anaximenes' notable students was Anaxagoras, who expanded on his mentor's ideas and introduced the concept of nous (mind or intellect) as the organizing principle of the universe. This idea of a rational, guiding force became a central tenet of later philosophical systems, particularly in the teleological concepts of Plato and Aristotle.

Anaximenes' influence extended beyond philosophy and into areas such as cosmology and meteorology. His findings on the nature of air laid the foundations for later theories on the composition of the atmosphere and the dynamics of weather phenomena.

In summary, Anaximenes occupies a significant place in the history of philosophy, as he was a pioneering thinker whose ideas reshaped ancient conceptions of the cosmos. By presenting air as a primary substance and explaining its transformative powers, he ushered in a new era of rational inquiry and empirical investigation that would profoundly influence Western thought. As we continue to unravel the mysteries of the universe, the legacy of Anaximenes reminds us of the unwavering power of human intellect and curiosity in our quest for understanding.

Relevance for our everyday lives

The philosophy of Anaximenes provides several insights that can be valuable in today's world:

  1. Understanding change and flow: Anaximenes considered air to be the fundamental substance from which all things arise and to which they return through processes of condensation and rarefaction. This view illustrates the dynamic and ever-changing nature of reality. In today's fast-paced world of rapid technological advances and social change, Anaximenes' philosophy encourages us to embrace change, to be adaptable and resilient.
  2. Holistic approach to health and well-being: Anaximenes' emphasis on air as the vital force that sustains life may influence today's understanding of health and well-being. In holistic health practices such as yoga, tai chi and mindfulness meditation, the breath plays a central role in promoting physical, mental and emotional balance. By integrating Anaximenes' insights on the importance of air and breath into our wellness routines, we can cultivate more vitality and harmony within ourselves.
  3. Environmental awareness and sustainability: Anaximenes' realization that air is the most important substance underscores the interconnectedness of all living things with the natural world. In a time of climate change and environmental degradation, Anaximenes' philosophy can remind us of the importance of air quality and environmental sustainability. By working to reduce air pollution, protect ecosystems and mitigate the effects of climate change, we can honor Anaximenes' vision of a harmonious relationship between humans and the environment.
  4. Promoting mindfulness and awareness: Anaximenes' notion of pneuma (breath or air) as the animating force of life is consistent with modern practices of mindfulness and conscious living. By cultivating awareness of our breath and its connection to our physical and mental state, we can improve our mindfulness practice and deepen our understanding of consciousness. The philosophy of Anaximenes invites us to explore the transformative power of breathwork and meditation to promote inner peace, clarity and self-knowledge.
  5. Inspiration for science: Anaximenes' realization that air is the primary substance and his explanation of natural phenomena in terms of condensation and rarefaction can inspire scientific investigation and innovation today. His naturalistic explanations paved the way for modern scientific investigations into the properties of gases, atmospheric phenomena and the physics of matter. By building on Anaximenes' ideas and linking them to today's scientific knowledge, researchers can further expand our understanding of the natural world and develop solutions to pressing global challenges.

Anaximenes' philosophy thus offers us valuable insights into the dynamic nature of reality, the importance of air and breath in sustaining life, and the interconnectedness of humanity with the environment. By harnessing these insights, we can cultivate greater resilience, wellbeing, environmental awareness, mindfulness and scientific curiosity in our lives and communities.

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