But Chrysippus, Posidonius, Zeno, and Boรซthus say, that all things are produced by fate. And fate is a connected cause of existing things, or the reason according to which the world is regulated.
Diogenes LaertiusWhen asked what learning was the most necessary, he said, ยNot to unlearn what you have learned!ย
Diogenes Laertius