Here is a pretty basic study I found on the Trinity; not sure who prepared it.
The
Bible clearly teaches, and the Doctrine of the Trinity asserts each
of these 5 truths:
1)
There is only ONE God and God is one (Principle:
The Oneness, and Unity of God) Deuteronomy 4:35, 6:4; Isaiah
43:10, 46:9; 1 Corinthians 8:6; 1 Timothy 2:5
2)
God the Father is fully God (Principle:
The Fatherhood of God and the Deity of the Father) John 6:27; 1
Corinthians 8:6; Colossians 1:3
3)
Jesus Christ, the Son, is fully and really God, and he is also fully
and really Man (Principle:
the True Humanity and True Deity of Jesus Christ) John 1:1-18;
John 8:58; John 20:28-29; Romans 9:5; Colossians 1:15-19; Philippians
2:5-11; Hebrews 1:3, 8-12; Titus 2:11-13; Revelation
7:15-17
4)
The Holy Spirit is a PERSON (a "He", not an "it")
and he is fully and really God (Principle:
The Personhood and Deity of the Holy Spirit) Genesis 1:2;
Matthew 10:19-20; Matthew 12:31-32; John 4:23-24; John 14:16-17;
John 15:26; Acts 3:4; 1Corinthians 12:4-6,11; 2 Corinthians 3:17
5)
There is a DISTINCTION between the Persons of the Father, the Son,
and the Holy Spirit (The Father is NOT the Son, and the Son IS NOT
the Spirit, and the Spirit IS NOT the Father) and yet we are not to
understand THREE Gods, but only ONE God. (Principle:
Distinctions between the Persons of the Godhead) John 1:1-2;
John 14:16-17, 26-26; John 15:26; John 16:13-15,25-28; John
17:1-5; John 20:17-18
Each
of these truths is clearly taught in the Scriptures. While no SINGLE
passage of Scripture teaches all of these truths together in one
place, each of the component truths is clearly taught in Scripture.
We believe ALL of what the Bible teaches us about God, not just
choosing some parts to believe and ignoring other parts. We believe
ALL of these truths SIMULTANEOUSLY.