Paul didn't teach this. He taught that there is one God — the Father. He didn't teach that Jesus was that one God, but rather that He was the one Lord. He said that the one God created everything, and that everything was created THROUGH the one Lord, Jesus:When I hear people pray, they often begin with 'Lord…', I assume they mean it, I don't know.
When I pray I say 'Lord', and I am usually convinced I am communicating with Jesus.
So if a person calls 'Jesus Lord' they consider Him Lord, if you do not consider Him Lord - and yet you are saying so - you really do not know what you are talking about, or who you are talking too.
Jesus cannot be Lord of your life if you do not believe that Jesus is Lord /God (I didn't say saved), because there is only One Lord. You may not understand His Deity, or even considered it to be saved but once confronted with the decision you have to pick 'Jesus is God' otherwise you have two gods.
For us there is one God, the Father, from whom are all things and for whom we exist, AND one Lord, Jesus Christ, through whom are all things and through whom we exist. (1 Corinthians 8:6)
One and one make two.
Jesus didn't teach that He was the one God. Rather, in His prayer to the Father, He addressed Him as "the only true God" and referred to Himself as someone OTHER than the only true God.
And this is eternal life, that they know you the only true God, AND Jesus Christ whom you have sent. (John 17:3)
Now the second century Christians ofter referred to Jesus as "God", but not in the sense that He was God the Father, nor in the sense that He was part of a Trinity, but in the sense that He was the Son of God, and therefore another One exactly the same as His Father ("the exact image of the Father's essence" (Hebrews 1:3), and therefore divine.
This is what John the apostle meant when He wrote Jesus "was God" in John 1:1. The word order and the omission of the article clearly indicates grammatically that He didn't mean that Jesus was the Father.
Also the only two extant manuscripts of John's gospel prior to 300 A.D. which contain John 1:18, papyrus 46 and papyrus 75, read that He was "the only begotten God". God the Father was not begotten. So if that tells you that there are two Gods, so be it. Jesus is God in this sense. But as He indicated in His prayer, the Father is the only true God.