The Bible does mention Father, Son, and Holy Spirit.
But riddle me this for I would like to understand.
1. In the Old Testament Adam was made in the image of God.
In the New Testament Adam was made in the figure of Him to come who is Jesus.
The image of God is the image of Christ.
Which means God had the plan to come in the future in flesh before He created Adam and Eve and created Adam in that image.
That means let us make man in our image has to include the man Christ Jesus for He is part of that image.
So is there a trinity or is the Let us make man in our image God and the man Christ Jesus.
2. Jews, Gentiles, and Samaritans in the book of Acts were all baptized in Jesus' name.
In the Old Testament God said He would reveal a new name to the Jews and speak to them.
Jesus said He came in the name of the Father.
Hebrews says the Son inherited the name from the Father.
John says the Holy Spirit comes in the name of Jesus.
So is there a trinity or is Jesus the name of the Father, Son, and Holy Ghost.
3. Jesus told the disciples that when He resurrects to heaven to not ask Him anything but only ask the Father and He will do it.
But in another passage of scripture Jesus said when He resurrects to heaven to ask Him and He will do it.
Is there a trinity or is Jesus our Father.
4. The Bible says to the saints there is but one God, the Father, and in another place one God and Father of all, who is above all, and through all, and in you all.
Why does the Bible only attribute the Father as being God.
Is there a trinity or is there only one God the Father.
I believe there is one God who is a Holy Spirit which is why the Spirit moved in creation, and Jesus was conceived by the Spirit, and the Spirit dwells in the saints.
And the Son is the man Christ Jesus, and Father is a title for God.