Numa

This is the reason, we are told, why the Pythagoreans also do not entrust their precepts to writing, but implant the memory and practice of them in living disciples worthy to receive them. And when their treatment of the abstruse and mysterious processes of geometry had been divulged to a certain unworthy person, they said the gods threatened to punish such lawlessness and impiety with some signal and wide-spread calamity.