Time to start speed reading!
Also invest in the great courses audio lecture series on the Republic. The lecturer is a political philosopher so is more interested in the outwards political aspects of the Republic.
For a somewhat left of field reading of the Republic there are several episodes of The Secret History of Western Esotericism Podcast which (academically) discusses possible esoteric and symbolic interpretations to be made in Plato and the Republic, over the course of multiple episodes, starting here.
His greatest student (and philosophical opponent) Aristotle. Start with the Nicomachean Ethics and go from there. The Organon treats language and logic; the Physics and Metaphysics discuss, well, physics and metaphysics; the Nicomachean and Eudemian Ethics and the Politics are on virtue, happiness and social science. The Nicomachean Ethics and the Politics should be an interesting contrast to the Republic.
I wouldn't recommend you any modern works on Plato until you've had a chance to develop your own sense of the dialogues. Scholars have been puzzling over the dialogues for centuries; there isn't a single accepted answer on how to read them or what they mean.
I would just recommend going at it head on with a standard presocratics reader They’re called pre-Socratics for a reason, in the sense that they are studied through the lens of how they played a role in the development of Socrates/Plato’s thought. secondary sources in general are typically focused on what you’re looking for.
I happen to be writing a graphic novel about this event. Part 1 is available for free download on Amazon until tomorrow night: https://www.amazon.com/dp/B07NGZQMBG
Would love to know what you think. (Though we don't get to the events of the Apology until part 3...)
I guess he would have known about meditation being a big part of the tradition.
The book I linked to has evidence of Parmenides being an energy healer, powers he developed from cave incubation -
https://www.amazon.com/Dark-Places-Wisdom-Peter-Kingsley/dp/189035001X/
Also if you study other traditions, looking at what the greats did, like the saints, sages, mystics, shaman etc, they all spend many years doing serious meditation.
I have this open in another tab; reality is veiled but can be revealed bit by bit during deep meditation -
https://www.youtube.com/watch?v=EbamU4A3Qk8
Just have to strip away all the religious language to see it I suppose and be prepared to put in the work to check it out for yourself.
From the Book's back cover:
> What is the good life for a human being? Aristotle’s exploration of this question in the Nicomachean Ethics has established it as a founding work of Western philosophy, though its teachings have long puzzled readers and provoked spirited discussion. Adopting a radically new point of view, Ronna Burger deciphers some of the most perplexing conundrums of this influential treatise by approaching it as Aristotle’s dialogue with the Platonic Socrates.
> Tracing the argument of the Ethics as it emerges through that approach, Burger’s careful reading shows how Aristotle represents ethical virtue from the perspective of those devoted to it while standing back to examine its assumptions and implications.
> “This is the best book I have read on Aristotle’s Nicomachean Ethics. It is so well crafted that reading it is like reading the Ethics itself, in that it provides an education in ethical matters that does justice to all sides of the issues.” —Mary P. Nichols, Baylor University
> “This is a work of distinction that will be indispensable for all serious students of Aristotle’s ethics. It requires and will repay a close reading of the Aristotelian texts. Burger’s book exhibits the lucidity that is appropriate to complex philosophical argument. In this sense, her study mirrors Aristotle’s own way of writing on the human predicament.” —Stanley Rosen, Boston University ''
More on Amazon.
From the Book's back cover:
> What is the good life for a human being? Aristotle’s exploration of this question in the Nicomachean Ethics has established it as a founding work of Western philosophy, though its teachings have long puzzled readers and provoked spirited discussion. Adopting a radically new point of view, Ronna Burger deciphers some of the most perplexing conundrums of this influential treatise by approaching it as Aristotle’s dialogue with the Platonic Socrates.
> Tracing the argument of the Ethics as it emerges through that approach, Burger’s careful reading shows how Aristotle represents ethical virtue from the perspective of those devoted to it while standing back to examine its assumptions and implications.
> “This is the best book I have read on Aristotle’s Nicomachean Ethics. It is so well crafted that reading it is like reading the Ethics itself, in that it provides an education in ethical matters that does justice to all sides of the issues.” —Mary P. Nichols, Baylor University
> “This is a work of distinction that will be indispensable for all serious students of Aristotle’s ethics. It requires and will repay a close reading of the Aristotelian texts. Burger’s book exhibits the lucidity that is appropriate to complex philosophical argument. In this sense, her study mirrors Aristotle’s own way of writing on the human predicament.” —Stanley Rosen, Boston University ''
More on Amazon.