When Thales was asked what was difficult, he said, To know one's self. And what was easy, To advise another.
Diogenes LaertiusBut 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 LaertiusApollodorus says, "If any one were to take away from the books of Chrysippus all the passages which he quotes from other authors, his paper would be left empty.
Diogenes Laertius