"There's no such thing as a carnal Christian."
Paul seems to disagree in his letters to the church at Rome (romans 17) and to the church at Corinth (1 Cor. 3).
"That the church building is not to be set apart and sanctified as a holy place?"
It is the people who are set apart and sanctified. The building is just that. When we are raptured it will still be here. Some meet in schools, some in shopping centers, some in Masonic Halls some in even meet in KOC buildings. Where two or three are together in His name there is He, even in a bar.
We carry sin though we're saved - I'm not disputing that. My point is that the Christian can't serve two masters. You can't be in love with the world and still serve Christ.
"Carnal Christians" are those who are ok with their sin, and see nothing wrong with immersing themselves in worldliness - sinning presumptuously in the face of Grace.
Romans 17? Have they added a new chapter?
And 1 Cor 3:17 actually proves my point.