Israel Promised Deliverance
Isaiah chapter 48:
12 Hearken unto me, O Jacob and Israel, my called; I am he; I am the first, I also am the last.
13 Mine hand also hath laid the foundation of the earth, and my right hand hath spanned the heavens: when I call unto them, they stand up together.
18 And Jesus came and spake unto them, saying, All power is given unto me in heaven and in earth. 19 Go ye therefore, and teach all nations, baptizing them in the name of the Father, and of the Son, and of the Holy Ghost: 20 Teaching them to observe all things whatsoever I have commanded you: and, lo, I am with you alway, even unto the end of the world. Amen.
The God who has the name Father, Son and Holy Ghost is the same God Jehovah who says “I am he; I am the first, I am also the last.
God is one person but he is also three persons. The three persons of Matthew 18 have numerical identity with the one person of Isaiah 48. Confusion arises if we are not specific about which person we are referring to. Are we referring to the person of the Godhead, the triune God as in Isaiah 48, who is one person although he consists of three persons; or do we mean one of the persons of the Godhead? One of the persons of the Godhead can not be either of the other two persons just as one side of a triangle can not be either of or both of the other two sides. Neither can a side of a triangle be the triangle itself. If a triangle represents the trinity and one side represents a person the resultant of the three sides is actually God, who is represented by the idea of a triangle. But a side represents a person so the resultant of three sides is again a person, the triune God. If a side is a person then this is actually a contradiction because three sides results in a person which is a side of the triangle. For three sides of the triangle to produce another side is a pure contradiction. So we have the contradiction that the result of three sides is a side and also a triangle. But the resultant side is three persons not one person which represents one side of the triangle of the trinity.
All three persons of the trinity are generically identical because they are all one and the same spirit which possesses the attributes of God.