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Wellsprings
metaphysics

The Unmoved Mover

τὸ πρῶτον κινοῦν

Aristotle reasoned that the cosmos's endless motion must trace back to a first cause that is never itself pushed — a perfect, eternal mind that moves everything by being desired, the way a beloved draws a lover.

Also: Prime Mover · first cause · aitia · prōton kinoun · primum movens

Aristotle proposed that the universe requires a first principle of motion that itself remains unmoved. This "unmoved mover" (to prōton kinoun) is eternal, immaterial, and perfectly actual—pure thought thinking about itself. Rather than being pushed or pulled by external forces, it causes all other motion simply by being the object of desire and contemplation throughout the cosmos. Everything else moves because it is drawn toward perfecting itself in relation to this ultimate principle.

The unmoved mover explains why circular motion—the eternal rotation of the heavens—never ceases and never degenerates. Since the outermost celestial sphere undergoes endless, perfect circular motion, there must exist something eternal and unchanging that induces this motion without itself being moved. For Aristotle, this solves the problem of infinite regress: we cannot have an endless chain of things moving other things, so the chain must terminate in something that moves everything else while remaining itself at rest.

Where this idea shows up

14 Greek sources·8 Jewish-canon citations

Where to read it