Then when we've also well divided off the things that are the things to which we have to give names if there are some things to which they can all be carried back, as names are to the letters, and from which we can see that they derive, and if different kinds of being are found among them, in just the way that there are among the letters once we've done all this well, we'll know how to apply each letter to what it resembles, whether one letter or a combination of many is to be applied to one thing.