What are the causes which have interrupted a flourishing science of experimental physics in antiquity after Democritus?
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Anaxagoras has taken from Heraclitus the idea that in every Becoming and in every Being the opposites are together.
He felt strongly the contradiction that a body has many qualities and he pulverised it in the belief that he had now dissolved it into its true qualities.
. . . . . . .
Plato: first Heraclitean, later Sceptic: Everything, even Thinking, is in a state of flux.
Brought through Socrates to the permanence of the good, the beautiful.
These assumed as entitative.
All generic ideals partake of the idea of the good, the beautiful, and they too are therefore entitative, being (as the soul partakes of the idea of Life). The idea is formless.
Through Pythagoras' metempsychosis has been answered the question: how we can know anything about the ideas.