Institutio Oratoria

Finally, how little the heavenly boon of reason avails those who are born dumb. If therefore we have received no fairer gift from heaven than speech, what shall we regard as so worthy of laborious cultivation, or in what should we sooner desire to excel our fellow-men, than that in which mankind excels all other living things?

And we should be all the more eager to do so, since there is no art which yields a more grateful recompense for the labour bestowed upon it. This will be abundantly clear if we consider the origins of oratory and the progress it has made; and it is capable of advancing still further.