lets see what the bible says about Grace lets start from Ephesians the 2nd chapter and verses 8-9
"For it is by grace you have been saved, through faith—and this is not from yourselves, it is the gift of God— 9 not by works, so that no one can boast"....so First of all we realize that the grace comes through faith ...faith in Jesus and the grace is described as a gift from God...now how about somebody who was in the faith but the abndoned the faith does grace still exist...now the book of 1st Timothy the 4th Chapter and we will start from verse 1 "The Spirit clearly says that in later times some will abandon the faith and follow deceiving spirits and things taught by demons." Now someone who has abandoned the faith to follow the teachings of Demons first of all will loose grace because it is a gift from God and it can also be taken away....Hebrews chapter 10 and we will start from verses 26 through to 29
"If we deliberately keep on sinning after we have received the knowledge of the truth, no sacrifice for sins is left, 27 but only a fearful expectation of judgment and of raging fire that will consume the enemies of God. 28 Anyone who rejected the law of Moses died without mercy on the testimony of two or three witnesses. 29 How much more severely do you think someone deserves to be punished who has trampled the Son of God underfoot, who has treated as an unholy thing the blood of the covenant that sanctified them, and who has insulted the Spirit of grace?" Now you cant insult the spirit of Grace and then think that the grace will continue living within you what happens after that is judgement...So grace can be taken to one who refuses to repent and turn from his sinful ways
My friend you need to look deeper. And not just look for select passages.
People have abandoned THE FAITH 9the gospel) because they DID NOT HAVE FAITH.
No different than a jew who started to walk with the church and the faith. But their true faith was always in the law. So they abandoned THE FAITH the gospel) and went back to what they truly believed.
As for sin
John said whoever is born of God can not live in sin, because they have been born of God
What is it about people who deny the power of God.?
Does God save? Yes.. In fact, we who are justified BY HIS BLOOD SHALL BE SAVED from his wrath..(rom 5)
Does God change people?? Yes (he who began a good work WILL complete it)
Does God make mistakes? No
so why do people insist that God fails to change people, and gives eternal life to people KNOWING they will depart from the church and become antichrists??