Jer 31:31 Behold, the days come, saith the LORD, that I will make a new covenant with the house of Israel, and with the house of Judah:
Jer 31:32 Not according to the covenant that I made with their fathers in the day that I took them by the hand to bring them out of the land of Egypt; which my covenant they brake, although I was an husband unto them, saith the LORD:
Jer 31:33 But this shall be the covenant that I will make with the house of Israel; After those days, saith the LORD, I will put my law in their inward parts, and write it in their hearts; and will be their God, and they shall be my people.
Jer 31:34 And they shall teach no more every man his neighbour, and every man his brother, saying, Know the LORD: for they shall all know me, from the least of them unto the greatest of them, saith the LORD: for I will forgive their iniquity, and I will remember their sin no more.
that is done,
but the the most frightening thing is to be in church and be a none believer. because,
2Thess 2:9 Even him, whose coming is after the working of Satan with all power and signs and lying wonders,
2Thess 2:10 And with all deceivableness of unrighteousness in them that perish; because they received not the love of the truth, that they might be saved.
2Thess 2:11 And for this cause God shall send them strong delusion, that they should believe a lie:
2Thess 2:12 That they all might be damned who believed not the truth, but had pleasure in unrighteousness.
God is sending a strong delusion, that's bad, (for the none believer). so no matter what, the Great Apostasy is coming, only, as said, "Let no man deceive you by any means: for that day shall not come, except there come a falling away first.