"A virtue (“'areté”') that is a path towards the invisible and unspeakable centre (“'árretos”') from which only the unfolding of those harmonious circumferences that are the straight, the round, the beautiful and the just is possible. But this requires “the highest knowledge (”'méghiston mathémata'“)”, that mathematical knowledge for which Plato had the words “No one may enter here who is not a geometer” written on the door of his school. (p. 40)"