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Wellsprings
cosmology

Atoms & the Void

ἄτομα καὶ κενόν

Reality stripped to two things: countless indivisible particles and the empty space they move through — everything else is just atoms colliding and combining.

Also: atomism · Democritean atomism · Epicurean atomism · atoms

Democritus developed atomism, the view that reality consists of two fundamental things: atoms (indivisible particles of matter) and the void (empty space). Atoms are infinite in number, eternal, and vary in shape and size, moving perpetually through boundless empty space. Nothing comes from nothing and nothing passes away; instead, the apparent birth and death of objects result from atoms combining and separating. This framework aimed to explain change and multiplicity while preserving the principle that being itself cannot be created or destroyed.

Atomism had radical consequences for understanding the physical world. Because atoms move through void and collide, they naturally cluster into temporary arrangements we perceive as distinct things—a stone, a flame, a human body. When these arrangements dissolve, atoms scatter and recombine into new forms. This explains why objects seem to come into being and pass away without violating the logical principle that the fundamental stuff of reality is eternal. Later Epicurus adopted this atomic theory, using it to argue that most things we fear, like divine punishment, are baseless projections of atoms in our minds.

Where this idea shows up

47 Greek sources·1 Jewish-canon citation

Where to read it