THEODORUS: By the god Ammon, Socrates, you are right; and I am glad to see
that you have not forgotten your geometry. But before I retaliate on you,
I must request the Stranger to finish the argument...

The Stranger suggests that Theaetetus shall be allowed to rest, and that
Socrates the younger shall respond in his place; Theodorus agrees to the
suggestion, and Socrates remarks that the name of the one and the face of
the other give him a right to claim relationship with both of them. They
propose to take the Statesman after the Sophist; his path they must
determine, and part off all other ways, stamping upon them a single
negative form (compare Soph.).

The Stranger begins the enquiry by making a division of the arts and
sciences into theoretical and practical--the one kind concerned with
knowledge exclusively, and the other with action; arithmetic and the
mathematical sciences are examples of the former, and carpentering and
handicraft arts of the latter (compare Philebus). Under which of the two
shall we place the Statesman? Or rather, shall we not first ask, whether
the king, statesman, master, householder, practise one art or many? As the
adviser of a physician may be said to have medical science and to be a
physician, so the adviser of a king has royal science and is a king. And
the master of a large household may be compared to the ruler of a small
state. Hence we conclude that the science of the king, statesman, and
householder is one and the same. And this science is akin to knowledge
rather than to action. For a king rules with his mind, and not with his
hands.

But theoretical science may be a science either of judging, like
arithmetic, or of ruling and superintending, like that of the architect or
master-builder. And the science of the king is of the latter nature; but