It was Plato, according to Sosigenes, who set this as a problem for those concerned with these things, through what suppositions of uniform and ordered movements the appearances concerning the movements of the wandering heavenly bodies could be preserved.
We ought to esteem it of the greatest importance that the fictions which children first hear should be adapted in the most perfect manner to the promotion of virtue.
The light dove, in free flight cutting through the air the resistance of which it feels, could get the idea that it could do even better in airless space. Likewise, Plato abandoned the world of the senses because it posed so many hindrances for the understanding, and dared to go beyond it on the wings of the ideas, in the empty space of pure understanding.
Plato is philosophy, and philosophy, Plato,--at once the glory and the shame of mankind, since neither Saxon nor Roman have availed to add any idea to his categories.
The people always have some champion whom they set over them and nurse into greatness. ... This and no other is the root from which a tyrant springs; when he first appears he is a protector.
Ornate rhetorick taught out of the rule of Plato.... To which poetry would be made subsequent, or indeed rather precedent, as being less suttle and fine, but more simple, sensuous, and passionate.
For the introduction of a new kind of music must be shunned as imperiling the whole state; since styles of music are never disturbed without affecting the most important political institutions.
Until philosophers are kings, or the kings and princes of this world have the spirit and power of philosophy, and political greatness and wisdom meet in one, and those commoner natures who pursue either to the exclusion of the other are compelled to stand aside, cities will never have rest from their evils - no, nor the human race, as I believe - and then only will this our State have a possibility of life and behold the light of day.
Again, truth should be highly valued; if, as we were saying, a lie is useless to the gods, and useful only as a medicine to men, then the use of such medicines should be restricted to physicians; private individuals have no business with them.
There is nothing that has caused me to meditate more on Plato's secrecy and sphinx-like nature, than the happily preserved petit fait that under the pillow of his death-bed there was found no 'Bible,' nor anything Egyptian, Pythagorean, or Platonic - but a book of Aristophanes. How could even Plato have endured life - a Greek life which he repudiated - without an Aristophanes!