Skip to content
Wellsprings
cosmology

Nature

φύσις

What does it mean for a thing to have a "nature"? The inner principle that makes it grow, change, and rest of its own accord.

Physis, often translated as "nature," refers to the intrinsic principle that governs growth, order, and the essential character of all living things. Greek philosophers, particularly the Stoics, understood nature as a rational, purposeful force operating throughout the cosmos. Rather than mere physical stuff, physis encompassed the animating principle that made each creature what it fundamentally is—its inner drive toward its own flourishing and proper function.

The Stoics applied this concept to ethics by arguing that humans should live "according to nature," meaning in harmony with our rational essence and natural inclinations. They observed that animals naturally care for their offspring and that nature implants in humans the seeds of justice, law, and community. This wasn't abstract theory: it meant that acting justly, building society, and caring for others reflected our deepest natural design, making virtue the highest human good because it aligned with the rational order woven into existence itself.

Where this idea shows up

168 Greek sources

Where to read it