Apollodorus 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 LaertiusIf appearances are deceitful, then they do not deserve any confidence when they assert what appears to them to be true.
Diogenes LaertiusAntisthenes used to say that envious people were devoured by their own disposition, just as iron is by rust.
Diogenes Laertius