But you, as legislator, would have to say exactly what you meant by 'moderate.' 'Very true.' And is our lawgiver to have no preamble or interpretation of his laws, never offering a word of advice to his subjects, after the manner of some doctors?
For of doctors are there not two kinds?
The one gentle and the other rough, doctors who are freemen and learn themselves and teach their pupils scientifically, and doctor's assistants who get their knowledge empirically by attending on their masters?
'Of course there are.' And did you ever observe that the gentlemen doctors practise upon freemen, and that slave doctors confine themselves to slaves?
The latter go about the country or wait for the slaves at the dispensaries.

They hold no parley with their patients about their diseases or the remedies of them; they practise by the rule of thumb, and give their decrees in the most arbitrary manner.

When they have doctored one patient they run off to another, whom they treat with equal assurance, their duty being to relieve the master of the care of his sick slaves.

But the other doctor, who practises on freemen, proceeds in quite a different way.

He takes counsel with his patient and learns from him, and never does anything until he has persuaded him of what he is doing.