But the criteria doesn't change. You are either washed by the blood of Jesus or not.
Yes, but the results of ones faith does change.
A person who believes today his body becomes a temple of the living God.
That is uniquely a Christian blessing, and it not given to the other saints.
[ David was not a Christian, Abraham wasn't, Moses wasn't, Noah wasn't, Abel wasn't, they were Jews and Gentiles. ]
But they lived by faith. Hebrews 11:39-40 And all these, having obtained a good testimony through faith, did not receive the promise, God having provided something better for us, that they should not be made perfect apart from us. In dispensationalism is there a belief that those of the old testament period did not have to have Faith in the coming Messiah to be saved?
That is not what we are talking about.
We are talking about what makes a Christian distinctive from the Jew or Gentile of the OT.
Today, a Christian has something that had never been given or will be given again, the indwelling of the Holy Spirit making his body a living temple. (1Cor.3:16)
When the Rapture occurs and anyone is saved after that, that will not occur with them, they will be either a saved Jew or saved Gentile, not a Christian.
Also sprach Scofield!