Oh dear Pan and all the other Gods of this place, grant that I may be beautiful inside. Let all my external possessions be in friendly harmony with what is within. May I consider the wise man rich. As for gold, let me have as much as a moderate man could bear and carry with him.
— Plato, speaking as Socrates, in the Phaedrus
The Phaedrus is a dialogue between Socrates, and Phaedrus, written by Plato around 370 BC, about the same time as his Republic. Plato had previously been a student of Socrates, and in the dialogues he subsequently wrote, Plato often used Socrates as the main character. The quote above could therefore be a quote from Socrates himself.
Plato having been taught by one of the titans of Western Philosophy, became the teacher of another: Aristotle.