When you distrust those whom you order to do anything, you ought to command them to do more than enough in order that they may do what is enough. The purpose of all exaggeration is to arrive at the truth by falsehood. Consequently, he who spoke of horses as being:

“Whiter than snows and swifter than the winds,”

“Whiter than snows and swifter than the winds,”

said what could not possibly be in order that they might be thought to be as much so as possible. And he who said:

“More firm than crags, more headlong than the stream,”

“More firm than crags, more headlong than the stream,”