Whether there are five notions?

❌ Objection 1 : It would seem that there are not five notions. For the notions proper to the persons are the relations whereby they are distinguished from each other. But the relations in God are only four (Question [28], Article [4]). Therefore the notions are only four in number.

❌ Objection 2 : Further, as there is only one essence in God, He is called one God, and because in Him there are three persons, He is called the Trine God. Therefore, if in God there are five notions, He may be called quinary; which cannot be allowed.

❌ Objection 3 : Further, if there are five notions for the three persons in God, there must be in some one person two or more notions, as in the person of the Father there is innascibility and paternity, and common spiration. Either these three notions really differ, or not. If they really differ, it follows that the person of the Father is composed of several things. But if they differ only logically, it follows that one of them can be predicated of another, so that we can say that as the divine goodness is the same as the divine wisdom by reason of the common reality, so common spiration is paternity; which is not to be admitted. Therefore there are not five notions.

❌ Objection 4 : On the contrary, It seems that there are more; because as the Father is from no one, and therefrom is derived the notion of innascibility; so from the Holy Ghost no other person proceeds. And in this respect there ought to be a sixth notion.

❌ Objection 5 : Further, as the Father and the Son are the common origin of the Holy Ghost, so it is common to the Son and the Holy Ghost to proceed from the Father. Therefore, as one notion is common to the Father and the Son, so there ought to be one notion common to the Son and to the Holy Ghost.