Dion

However, with a desire to make head against the bad repute which he had also won among the philosophers on Plato’s account, he assembled at his court many men with a reputation for learning.

But he was ambitious to surpass them all in discussion, and was therefore driven to use inaptly what he had imperfectly learned from Plato.

So he yearned once more for that philosopher, and reproached himself for not having utilized his presence to learn all that he should have learned.

And since, like a tyrant, he was always extravagant in his desires and headstrong in all that he undertook, he set out at once to secure Plato, and, leaving no stone unturned, persuaded Archytas and his fellow Pythagoreans to become sureties for his agreements, and to summon Plato; for it was through Plato, in the first place, that he had entered into friendly relations with these philosophers.