Dr. Grudem continues his teaching on the trinity in part 2. Below is an outline of the topics Grudem discusses. There is a link to the MP3 audio at the end of the outline.
B) Three statements summarize the biblical teaching. (231-241)
1) God is three persons.
a) The fact that God is three persons means that each person of the Trinity is distinct from the other two persons. (John 1:1-2, 17:24; 1 John 2:1; Heb. 7:25; John 14:26;Rom. 8:27; Matt. 28:19; John 16:7; 1 Cor. 12:4-6)
i) The Holy Spirit is a distinct person not just the power of God. (Eph. 4:4-6; John14:26, 15:26; Rom. 8:26-27; 1 Cor. 2:10; Acts 16:6-7; Acts 8:29; Eph. 4:30)
(a) Passages that would not make sense if the Holy Spirit is just the "power of God." (Luke 4:14; Acts 10:38)
(b) What about 2 Cor. 3:17?2) Each person is fully God.
a) God the Father is clearly God.
b) The Son is fully God. (John 1:1-4, 20:28, 30-31; Titus 2:13; Rom. 9:5; Isa. 9:6; Col.2:9)
c) The Holy Spirit is also fully God. (Matt. 28:19; 1 Cor. 12:4-6; 2 Cor. 13:14; Acts 5:3-4; 1Cor. 3:16)
3) There is one God. (Deut. 6:4-5; 1 Kings 8:60; Isa. 45:5-6, 21-22; 1 Tim. 2:5, Rom. 3:30;1 Cor. 8:6; James 2:19)
4) Simplistic solutions must all deny one strand of biblical teaching.
5) All analogies have shortcomings. Ultimately no analogy adequately teaches about theTrinity, and all are misleading in significant ways.
6) God eternally and necessarily exists as the Trinity. (John 1:3; Col. 1:16; Heb. 1:2; Gen.1:2; John 17:5, 24)
C) Errors have come by denying any of the three statements summarizing the biblical teaching.(241-248)
1) Modalism claims that there is one person who appears to us in three different forms (or"modes"). (sometimes call Sabellianism or Modalistic Monarchianism)
a) Modalism gains its attractiveness from the desire to emphasize clearly the fact thatthere is only one God. (John 10:30, 14:9)b) Shortcoming: It must deny the personal relationships with in the Trinity and deniesthe independence of God.
2) Arianism denies the full deity of the Son and the Holy Spirit.
a) The term Arianism derives from fourth century Alexandrian bishop Arius, who taughtthat God the Son was created.
b) Subordinationism held that the Son was eternal and divine, but still not equal to the Father in being or attributes.
c) Adoptionism is the view that Jesus lived as an ordinary man until his baptism, butthen God "adopted" Jesus as his "Son" and conferred on him supernatural powers.
d) The Filioque ("and from the Son") Clause (John 15:26, 16:7)
e) The Importance of the Doctrine of the Trinity
i) Atonement, Justification, Idolatry, Independence and Personality of God, Unity inthe Universe
3) Tritheism denies that there is only one God.
D) What are the distinctions between the Father, the Son, and the Holy Spirit? (248-256)
1) The persons of the Trinity have different primary functions in relating to the world(economy of the Trinity).
a) Creation (John 1:3; Col. 1:16; Gen. 1:2)
b) Redemption (John 3:16; Gal. 4:4; Eph. 1:9-10; John 6:38; Heb. 10:5-7; John 14:26,3:5-8; Rom. 8:13; Acts 1:8)
2) The persons of the Trinity eternally existed as Father, Son, and Holy Spirit. (Eph. 3:14-15; John 1:1-5; Phil. 2:5-11; Eph. 1:3-4; Rom. 8:29; 1 Peter 1:2; John 3:16-17)
a) The only distinction between the members of the Trinity is in the ways they relate toeach other and to the creation. (ontological equality but economic subordination)
3) What is the relationship between the three persons and the being of God?
a) God's being is not divided into three equal parts belonging to the three members ofthe Trinity.
b) The personal distinctions in the Trinity are not something added onto God's real being.
c) The persons of the Trinity are not just three different ways of looking at the one being of God.
d) There are three distinct persons, and the being of each person is equal to the wholebeing of God.
4) Can we understand the doctrine of the Trinity?
a) Although the doctrine of the Trinity is shrouded in mystery, it is not correct to saythat we can understand nothing about the Trinity.
E) Application (256-257)
1) Unity and Diversity in Creation (Gen. 1:27; Eph. 5:31; 1Cor. 11:3; 1 Cor. 12:12; Eph.2:16, 3:8-10)
http://scottsdalebible.com/assets/audio/christian-essentials/20060820WGrudem.mp3