What the Bible says, God, says. The foundation of what we know to be true about the Bible is the inspiration or expiration of Scripture. It comes to us from God.
God is one and God is three. There is a plurality within the Godhead but the three persons are one in unity. May we be led to worship our triune God as we seek to understand Him in His trinitarian nature. Praise the Father, praise the Son, and praise the Holy Spirit.
Jesus is the second person of the Trinity, truly God and truly man.