have no intermediary could not be opposites; in the second, as it is easily granted that there is a great difference between one nature and another, and as we have nothing greater to serve as measure for this distance, we shall have to examine by what characteristics oppositeness might be recognized. CONTRARIES ARE THOSE THINGS THAT LACK RESEMBLANCE. To begin with, resemblance does not mean only belonging to the same genus, nor mere confusion from more or less numerous characteristics, as, for instance, by their forms. Things that possess resemblance, therefore, are not opposites. Only things which have nothing identical in respect to species are opposites;[414] though we must add that they must belong to the same genus of quality. Thus, though they have no intermediaries, we can classify as opposites the things which betray no resemblance to each other; in which are found only characteristics which do not approximate each other, and bear no kind of analogy to each other. Consequently, objects which have something in common in the respect of colors could not be contraries. Besides, not everything is the contrary of every other thing; but one thing is only the contrary of some other; and this is the case with tastes as well as with colors. But enough of all this. QUALITIES ADMIT OF DEGREE. Does a quality admit of more or less?[410] Evidently the objects which participate in qualities participate therein more or less. But the chief question is whether there be degrees in virtue or justice? If these habits possess a certain latitude, they have degrees. If they have no latitude, they are not susceptible of more or less. REASONS WHY MOVEMENT IS A CATEGORY. 21. Let us pass to movement.[415] Admittedly movement is a genus with the following characteristics: first, movement cannot be reduced to any other genus; then, nothing higher in the scale of being can be predicated of it; last, it reveals a great number of differences which constitute species. MOVEMENT CANNOT BE REDUCED TO ANY HIGHER GENUS.