There are people who don't understand the Godhead (Trinity). It's not three gods in one God.
It's one God who co-exists as three distinct persons (yet not separated).
The Godhead (Trinity):
The Bible teaches that there is one God (Deuteronomy 6:4) (1 Timothy 2:5) (Isaiah 45:5).
Yet, the Bible also teaches that there are distinctions within the Godhead or that there is a plural nature to God.
Here are a couple of quick points:
#1. The word Elohim (אֱלֹהִ֔ים) is both a singular and a plural noun.
#2. God refers to Himself in plural form (Genesis 1:26) (Genesis 3:22) (Genesis 11:7) (Isaiah 6:8).
#3. Plurality of God in New Testament (Matthew 28:19) (2 Corinthians 13:14) (John 14:16-20).
#4. Introductions to both the Son & Holy Spirit (Daniel 7:9-10, Daniel 7:13-14) (John 14:16)
#5. Different persons of Godhead appear at one time (Luke 3:21-22)
#6. Distinctions of Wills (Luke 22:42).
#7. Conversations Between the Godhead (Psalms 2:1-12) (Psalms 45:6-7) (Psalms 110:1) (Matthew 11:27) (John 17:24).
The most clearest verse in Scripture that describes the Trinity is 1 John 5:7.
“For there are three that bear record in heaven, the Father, the Word, and the Holy Ghost: and these three are one.” (1 John 5:7).
This verse appears in the King James Version but it is wrongfully removed from many Modern Translations.
Now, there are two wrong extremes people have made involving the Trinity.
#1. Modalism
(Which is a belief held by United Pentecostals).
This says that there are no distinctive persons within the Godhead. That God the Father just puts on a mask and pretends to be the Son; Others believe it says all three persons are smashed together whereby the Father, the Son, and the Holy Ghost do not have any kind of distinctiveness anymore. But the Bible makes it clear that the Father sent the Son to die for our sins (And it was not the Son sending the Father) (1 John 4:14). The Bible makes it clear that one cannot be forgiven if they speak a word against the Holy Spirit but yet, this is not the case if one speaks a word against the Son, though (Matthew 12:32).
#2. Tritheism
(Which is a belief held by Mormons).
This says that the Father, the Son, and the Holy Ghost are three separate and distinct gods. This is polytheism or the worship of more than one God. But the Bible makes it clear that the Lord our God is one God (Deuteronomy 6:4).
Then there is the correct view of the Trinity:
The Lord our God exists as one God, but He exists as three distinct persons (i.e. The Father, the Word (Christ), and the Holy Ghost). All three persons co-existed as one God for all eternity. Also, in the Trinity, the Father and the Son can dwell within one another despite their distinctiveness as persons within the Godhead, too. For Jesus said He dwells in the Father and the Father dwells in Him (John 14:10) (John 17:21).
Romans 1:20 says,
"For the invisible things of him from the creation of the world are clearly seen, being understood by the things that are made, even his eternal power and Godhead; so that they are without excuse:"
Meaning, even nature itself declares the Godhead (or the Trinity).
Atoms = Nucleus, Protons, Electrons.
Water Molecules = Hydrogen Atom, Hydrogen Atom, Oxygen Atom.
Colors of White Light = Red, Blue, Green.
Man's Formation = Dust, Mist (i.e. Water), Breadth of Life.
Man Made in God's Image = Physical Body, Spirit Body, Soul.
Although the word "Trinity" is not found within the Scriptures, the word "Godhead" is used instead (Acts 17:29) (Romans 1:20) (Colossians 2:9).
Jesus had power as God.
#1. Jesus said He has power to raise the dead to life just as the Father had power to raise the dead (John 5:21).
#2. Hebrews 1:3 talks about how Christ held all things together by the word of His power when He purged us of our sins.
#3. Jesus said, He would raise up this Temple (His body) three days later (John 2:19).
#4. Jesus had the power to forgive sins and give eternal life (Mark 2:7) (Luke 7:44-50) (John 14:6).
#5 Jesus had the power to take away the sins of the entire world (John 1:29).
#6. Jesus Christ said wherever two or three are gathered in my name, there I am among them (Matthew 18:20). This was said to the people he was around and not to just us today.
#7. Jesus knew men's thoughts (Matthew 9:4) (Matthew 12:25) (Mark 2:8) (Luke 5:22) (Luke 6:8) (Luke 9:47) (Luke 24:38).
#8. Jesus knew about the lives of others (John 2:24) (John 4:17-18) (John 4:29) (John 6:64).
God purchased us with His own blood:
“Take heed therefore unto yourselves, and to all the flock, over the which the Holy Ghost hath made you overseers, to feed the church of God, which he hath purchased with his own blood.” (Acts of the Apostles 20:28).
There is no Savior beside or next to God:
“I, even I, am the LORD; and beside me there is no saviour.” (Isaiah 43:11).
“So then after the Lord had spoken unto them, he was received up into heaven, and sat on the right hand of God.” (Matthew 16:19).
Does Jesus Have a God?
(Explaining John 20:17):
Jesus saith unto her,
"Touch me not; for I am not yet ascended to my Father: but go to my brethren, and say unto them, I ascend unto my Father, and your Father; and to my God, and your God."" (John 20:17).
Is Jesus (Who is God) really saying He has a God?
In other words, does God have a God?