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.116
Nay, we may go further, and say that it is practically plain what among things which can be otherwise does exist by nature, and what does not but is dependent upon enactment and conventional, even granting that both are alike subject to be changed: and the same distinctive illustration will apply to this and other cases; the right hand is naturally the stronger, still some men may become equally strong in both.
A parallel may be drawn between the Justs which depend upon convention and expedience, and measures; for wine and corn measures are not equal in all places, but where men buy they are large, and where these same sell again they are smaller: well, in like manner the Justs which are not natural, but of human invention, are not