" To the passionate language of Parmenides, Plato replies in a strain equally passionate:--What! has not Being mind? and is not Being capable of being known? and, if this is admitted, then capable of being affected or acted upon?--in motion, then, and yet not wholly incapable of rest. Already we have been compelled to attribute opposite determinations to Being. And the answer to the difficulty about Being may be equally the answer to the difficulty about Not-being. "

― Plato , Plato: Complete Works