There is a written and an unwritten law. The one by which we regulate our constitutions in our cities is the written law; that which arises from customs is the unwritten law.
Diogenes LaertiusWhen asked what learning was the most necessary, he said, ยNot to unlearn what you have learned!ย
Diogenes LaertiusIf appearances are deceitful, then they do not deserve any confidence when they assert what appears to them to be true.
Diogenes Laertius