It is a principle that the right to a thing gives a right to the means without which it could not be used, that is to say, that the means follow their end.
Some think that even the ancients who lived long before the present generation, and first framed accounts of the Gods, had a similar view of nature; for they made the Oceanus and Tethys the parents of creation, and described the oath of the Gods as being by water, to which they give the name of Styx; for what is oldest is most honourable, and the most honourable thing is that by which one swears