Now if in this particular science any one would attend to its original seeds, and their first shoot, he would then as in others have the subject perfectly before him; and perceive, in the first place, that it is requisite that those should be joined together whose species cannot exist without each other, as the male and the female, for the business of propagation; and this not through choice, but by that natural impulse which acts both upon plants and animals also, for the purpose of their leaving behind them others like themselves.

It is also from natural causes that some beings command and others obey, that each may obtain their mutual safety; for a being who is endowed with a mind capable of reflection and forethought is by nature the superior and governor, whereas he whose excellence is merely corporeal is formect to be a slave; whence it follows that the different state of master [1252b] and slave is equally advantageous to both.

But there is a natural difference between a female and a slave: for nature is not like the artists who make the Delphic swords for the use of the poor, but for every particular purpose she has her separate instruments, and thus her ends are most complete, for whatsoever is employed on one subject only, brings that one to much greater perfection than when employed on many; and yet among the barbarians, a female and a slave are upon a level in the community, the reason for which is, that amongst them there are none qualified by nature to govern, therefore their society can be nothing but between slaves of different sexes.

For which reason the poets say, it is proper for the Greeks to govern the barbarians, as if a barbarian and a slave were by nature one.

Now of these two societies the domestic is the first, and Hesiod is right when he says, "First a house, then a wife, then an ox for the plough," for the poor man has always an ox before a household slave.