"Like Empedokles, Anaxagoras required some external cause to produce motion in the mixture. Body, Parmenides had shown, would never move itself... Anaxagoras called the cause of motion... . ...[T]his ...made Aristotle say that he "stood out like a sober man from the random talkers that had preceded him," and he has often been credited with the introduction of the spiritual into philosophy. ...[D]isappointment [was] expressed ...by Plato and Aristotle as to the way in which Anaxagoras worked out the theory ... Plato makes Sokrates say: "I once heard a man reading a book... of Anaxagoras... saying it was Mind that ordered the world and was the cause of all things. I was delighted... and... thought he... was right. ...But my extravagant expectations were all dashed... when I... found... the man made no use of Mind... He ascribed no causal power... to it in the ordering of things, but to airs, and aethers, and waters, and a host of other strange things." Aristotle... says: "Anaxagoras uses Mind as a ' to account for the formation of the world ; and whenever he is at a loss to explain why anything necessarily is, he drags it in. But in other cases he makes anything rather than Mind the cause." These utterances... suggest... Nous of Anaxagoras did not... stand on a higher level than... Love and Strife of Empedokles..."