 it does not seem that a relation adds anything real to that on which it is immediately founded, but only means another ratio realis of the same thing, which is real to the extent that such a ratio of the relation really is in the thing, and not solely in the intellect. But it is not really another in the sense of being another ‘thing’ or essence; it is only another ratio that is included in the thing without any difference [between the ratio and the thing] (Summa II q. 54, p. 260).