Anaxagoras wrote a book On Nature. He believed that the universe was originally an undifferentiated mass until it was worked upon by mind (nous), a spiritual component. (Anaxagoras was the first to attach importance to the concept of mind.) He believed there were no pure stuffs in the universe but that everything shared a part of everything else.
"There is a portion of everything in everything."
Into the chaos in which the seeds of all things were jumbled, mind inserted motion. As it gained speed, a vortex formed and objects separated out.
Sources: Early Greek Philosophers, by Jonathan Barnes.
IEP Anaxagoras
Anaxagoras Fragments and Commentary
- Objects differ in the preponderance of one type of seed over another.
- The material world is a continuum that is infinitely divisible.

