Nicocles or the Cyprians (5-8)

But the fact is that since they have not taken the trouble to make distinctions after this manner in each instance, they are ill-disposed to all eloquence; and they have gone so far astray as not to perceive that they are hostile to that power which of all the faculties that belong to the nature of man is the source of most of our blessings. For in the other powers which we possess we are in no respect superior to other living creatures; nay, we are inferior to many in swiftness and in strength and in other resources;

but, because there has been implanted in us the power to persuade each other and to make clear to each other whatever we desire, not only have we escaped the life of wild beasts, but we have come together and founded cities and made laws and invented arts; and, generally speaking, there is no institution devised by man which the power of speech has not helped us to establish.[*]

For this it is which has laid down laws concerning things just and unjust, and things base and honorable; and if it were not for these ordinances we should not be able to live with one another. It is by this also that we confute the bad and extol the good. Through this we educate the ignorant and appraise the wise; for the power to speak well is taken as the surest index of a sound understanding, and discourse which is true and lawful and just is the outward image of a good and faithful soul.

With this faculty we both contend against others on matters which are open to dispute and seek light for ourselves on things which are unknown; for the same arguments which we use in persuading others when we speak in public, we employ also when we deliberate in our own thoughts; and, while we call eloquent those who are able to speak before a crowd, we regard as sage those who most skilfully debate their problems in their own minds.