JD wrote:For the gospel is the power of God UNTO salvation to everyone that believeth, to the Jew first and also to the gentile!
It is only that "power" in the believer. Grace and the Holy Spirit enables the elect to believe.
Verse 19 goes on to reveal
Romans 1:19 Because that which may be known of God is manifest in them; for God hath shewed it unto them.
Thus it reveals what you keep trying to exclude. = Namely God's involvement.