this is interesing

Romans 21:25-29(italicized words are in brackets)

25For I would not, brethren, that ye should be ignorant of this mystery, lest ye should be wise in your own conceits; that blindness in part is happened to Israel, until the fulness of the Gentiles be come in.
26And so all Israel shall be saved: as it is written, There shall come out of Sion the Deliverer, and shall turn away ungodliness from Jacob:
27For this [is] my covenant unto them, when I shall take away their sins.
28As concerning the gospel, [they are] enemies for your sakes: but as touching the election, [they are] beloved for the fathers’ sakes.
29For the gifts and calling of God [are] without repentance.

concentrate on verse 29; if what this says is true, then that means once God has saved someone, they CAN'T fall away. which means... those who are saved, but later deny their faith and die without taking back their renouncing... were not saved to begin with. why else would jesus say in the gospels,
"i never knew you"? did he say, "i once knew you, but you fell away?"

also think about verse 26; do you think that refers to a spiritual Israel, or the fleshly Israel? wouldn't it be lying if it referred to the Jews? hence, are we supposed to expect that there will be a massive revival of Jews?