Wayne Grudem’s Systematic Theology defines the Trinity as follows: “God eternally exists as three persons, Father, Son, and Holy Spirit, and each person is fully God, and there is one God” (p. 226).
Broken down, this amounts to three propositions:
- God is three persons.
- Each person is fully God.
- There is one God.
In addition, it’s helpful to elaborate on the fact that when we say “God is three persons,” we mean that he is not just one person, and that the persons of the Trinity are not to be confused. So we can also say:
- The Father is God.
- The Son is God.
- The Holy Spirit is God.
- The Father is not the Holy Spirit, and the Holy Spirit is not the Fathe…