There is a great debate among the church as to whether God is three persons in one, a triune God or that there is no trinity at all. I can find no support for the latter, but much support of the first, that although there is one God, he exists in three persons. There are essentials and non -essentials pertaining to church denomination and salvation. Many churches are very legalistic in their beliefs, for instance some believe woman cannot wear make- up, jewelry, pants, no cutting your hair and the list goes on. Other denominations believe you cannot dance, see movies, watch television etc… those really are not important for Salvation, however, they can have an effect on our walk and other peoples relationship with the Lord. They are non-essentials.

We always need to be aware of what we are watching, looking at on TV or other places. We should be aware of how we dress because men are visual by nature, granted some will still look and lust even if you were in a potato sack. We are to be Holy because He is Holy. 1 Peter 1:16 because it is written,”Be holy, for I am Holy,” and conduct ourselves in a way that builds up the kingdom, what we do matters, but it cannot save or un-save us, but what we believe about Christ is most important! It is an essential, not a non-essential.

I am simply going to write a few of the verses, not all that support s triune God. 

(Eph 4:4-6) 4 There is one body and one Spirit, just as you were called to one hope when you were called; 5 one Lord, one faith, one baptism; 6 one God and Father of all, who is over all and through all and in all.

(1 Cor 8:6) 6 yet for us there is but one God, the Father, from whom all things came and for whom we live; and there is but one Lord, Jesus Christ, through whom all things came and through whom we live.

(1 John 1:4) 14 The Word became flesh and made his dwelling among us. We have seen his glory, the glory of the one and only Son, who came from the Father, full of grace and truth.

(Matt 3:16-1) 16 As soon as Jesus was baptized, he went up out of the water. At that moment heaven was opened, and he saw the Spirit of God descending like a dove and alighting on him. 17 And a voice from heaven said, “This is my Son, whom I love; with him, I am well pleased.

Isaiah 48:16
16 “Come near me and listen to this:“From the first announcement I have not spoken in secret; at the time it happens, I am there.” And now the Sovereign Lord has sent me,endowed with his Spirit.

John 10:30 ” I and the Father are one.”

John 14:16-17 ” And I will ask the Father, and he will give you another advocate to help you and be with you forever. 17 the Spirit of truth. The world cannot accept him because it neither sees him or knows him. But you know him, for he lives with you and will be in you.”

1 John 5:
7-8 “For there are three that testify: 8 the Spirit, the water and the blood; and the three are in agreement.”

What we see His there is one God, one essence in three persons. I will admit it is hard to understand, but clearly what scripture teaches. We must accept by faith something that seems impossible, but impossible only by human standards and minds. God’s ways are higher than ours,

 (Isaiah 55:8-9)  
“For my thoughts are not your thoughts, neither are your ways my ways,”
declares the Lord. “As the heavens are higher than the earth, so are my ways higher than your ways and my thoughts than your thoughts. 
(Job 11:7) “Can you fathom the mysteries of God? Can you probe the limits of the Almighty?

If you are one of those people who cannot wrap your mind around a triune God, search the scriptures it will become more and more clear to you. As you read ask the Holy Spirit to teach you, He will. That is one of his roles in our lives, teaching us the truth.