I believe in the Jesus that Paul speaks of in 1 Cor 15:1-4.Where...

I believe in the Jesus that Paul speaks of in 1 Cor 15:1-4.
Where does Paul verses that teach justification is void if a believer believes Christ has always existed in some other form :-
eg :-
John 3:13
No one has ascended to heaven but He who came down from heaven, that is, the Son of Man who is in heaven.
John 6:38
For I have come down from heaven, not to do My own will, but the will of Him who sent Me.
Colossians 1:15-16
He is the image of the invisible God, the firstborn over all creation.