8 Bible Verses about Apostate Believers

Brothers, if any one of you is overwhelmed by a [particular] sin, those of you who are spiritually minded should [attempt to] restore such a person [to faithfulness]. But do it in a gentle way, being very careful that you yourself do not become tempted [to get involved in any sin].

[I command you], when you people are assembled together, with my spirit [also present], in the name [i.e., by the authority] and power of our Lord Jesus, to turn such a person over to Satan for his body to be destroyed [Note: This probably refers to his removal from their fellowship. See verse 2], in order for his spirit to be saved in the day of the Lord [i.e., the judgment day]. [Note: This implies that his removal from their fellowship will have produced a genuine repentance before that time].

My brothers, if anyone among you strays away from the truth [of God's inspired message], and someone brings him back [to it], that person should know that whoever brings a sinner back from the error of his way will save that soul from [spiritual] death and will cover over a large number of sins [i.e., the many sins of that person will become forgiven].

If anyone [of you] observes his brother [or sister] sinning [in a way that would not lead] to [spiritual] death, he should ask [God, in prayer, to help that person], and God will give him [spiritual] life, [that is], to such ones, provided their sin is not leading to [spiritual] death. There is such a sin that leads to [spiritual] death. [See Heb. 6:4-6; I Tim. 5:6; Heb. 10:26-27; II Pet. 2:20-22]. I am not suggesting that you should ask [God, in prayer] about such a situation. All wrongdoing is sinful, and [yet] there is a situation where [a person's] sin does not lead [him] to [spiritual] death.

that person should know that whoever brings a sinner back from the error of his way will save that soul from [spiritual] death and will cover over a large number of sins [i.e., the many sins of that person will become forgiven].

[These are people] who were once enlightened [by the Gospel message], who had experienced the gift from heaven [i.e., forgiveness, never ending life, etc. See Rom. 6:23], who had partaken of the Holy Spirit [See Acts 2:38], and who had experienced the good teaching of God and the powers of the coming age [i.e., they had already received some of the blessings of the Christian life, perhaps even miraculous signs]. (OMITTED TEXT)read more.
For God blesses land that has soaked up the rain which has fallen on it, and it produces a profitable crop for those people for whom the land was farmed. But if the land produces [only] thorns and thistles, it is worthless and in danger of being cursed [by God], and will end up being burned.

For if we go on sinning intentionally, after we have received the full knowledge of the truth, there is no longer any sacrifice for [our] sins. Instead, [there will be] a fearful expectation of [coming] judgment and of [God's] raging fire which will consume His enemies. The person who has disregarded the law of Moses is put to death without being shown mercy on the testimony of two or three witnesses.read more.
How much more severely do you think a person deserves to be punished who has trampled on the Son of God and has regarded the blood of the [New] Agreement, with which he was set apart for God, an unholy thing and has insulted the Holy Spirit, through whom God's unearned favor is shown?

But since you are lukewarm, and neither hot nor cold, I am about to vomit you out of my mouth.