This, by the way, is the reason why we do not allow a man to govern, but Principle, because a man governs for himself and comes to be a despot: but the office of a ruler is to be guardian of the Just and therefore of the Equal. Well then, since he seems to have no peculiar personal advantage, supposing him a Just man, for in this case he does not allot to himself the larger share of what is abstractedly good unless it falls to his share proportionately (for which reason he really governs for others, and so Justice, men say, is a good not to one’s self so much as to others, as was mentioned before), therefore some compensation must be given him, as there actually is in the shape of honour and privilege; and wherever these are not adequate there rulers turn into despots. But the Just which arises in the relations of Master and Father, is not identical with, but similar to, these; because there is no possibility of injustice towards those things which are absolutely one’s own; and a slave or child (so long as this last is of a certain age and not separated into an independent being), is, as it were, part of a man’s self, and no man chooses to hurt himself, for which reason there cannot be injustice towards one’s own self: therefore neither is there the social Unjust or Just, which was stated to be in accordance with law and to exist between those among whom law naturally exists, and these were said to be they to whom belongs equality of ruling and being ruled. Hence also there is Just rather between a man and his wife than between a man and his children or slaves; this is in fact the Just arising in domestic relations: and this too is different from the Social Just. Further, this last-mentioned Just is of two kinds, natural and conventional; the former being that which has everywhere the same force and does not depend upon being received or not; the latter being that which originally may be this way or that indifferently but not after enactment: for instance, the price of ransom being fixed at a mina, or the sacrificing a goat instead of two sheep; and again, all cases of special enactment, as the sacrificing to Brasidas as a hero; in short, all matters of special decree. But there are some men who think that all the Justs are of this latter kind, and on this ground: whatever exists by nature, they say, is unchangeable and has everywhere the same force; fire, for instance, burns not here only but in Persia as well, but the Justs they see changed in various places. Now this is not really so, and yet it is in a way (though among the gods perhaps by no means): still even amongst ourselves there is somewhat existing by nature: allowing that everything is subject to change, still there is that which does exist by nature, and that which does not.[23]