De Agricultura

For if it is customary to give both the names of shepherd and keeper of sheep to those who have the management of flocks, still they do not give these names to that reason which is the superintendant of the flock of the soul; for a man who is but an indifferent manager of a flock is called a keeper of sheep, but a good and faithful one is called a shepherd, and in what way we will proceed to show immediately.