Short Art

for whatever exists is either in difference, concordance, or contrariety; and outside these principles it is not possible to find anything. It must be known, however, that each angle of this triangle has three species; for difference is between the sensual and the sensual, as for example between a stone and a tree. Again, between the sensual and the intellectual, as for example between the body and the soul. Furthermore, between the intellectual and the intellectual, just as between the soul, God, and the angel; and thus, it can be said of concordance and contrariety in their own way. And this difference existing in any angle of this triangle is a scale of the intellect through which it ascends and descends, so that the natural middle term between subject and predicate can be found, with which middle term it can conclude and declare the proposition; and thus, it can be said of the scale of concordance and contrariety in its own way. Another triangle is of beginning, middle, and end, in which falls whatever exists; for whatever exists is either in a beginning, a middle, or an end; and outside these principles, nothing is discoverable. In the angle of the beginning, the cause signifies the efficient, material, formal, and final cause; through quantity, however, and time, the other nine categories are signified, and those things which can be reduced to them. In the angle of the middle, there are three species of the middle, such as the middle of conjunction, which exists between subject and