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Soul (ψυχή) often equated with life-force or breath.
"all things are full of gods" Aristotle, De Anima 411a7, quoting Thales
Heraclitus: the soul has a deep, unexplored structure and needs to be “kindled” like fire to become wise
Pythagoreans: soul is immortal and transmigrates (metempsychosis).
Empedocles and Anaxagoras introduce NOUS (mind) as a soul-like power.
No strict separation yet between physical and spiritual dimensions.