stuart lawrence said in post #371:
To be righteous under the law requires 100 percent perfect obedience of it.
We are to be "perfecting holiness
in the fear of God" (2 Corinthians 7:1). But if we slip up and commit a sin, there is still a way for us to regain perfect holiness before God. For:
1 John 1:9 If we confess our sins, he is faithful and just to forgive us our sins, and
to cleanse us from all unrighteousness.
The problem arises if we wrongly employ our free will to stop repenting from our sins (Hebrews 10:26-29), or to stop doing good works of faith (Romans 2:6-8), or to stop believing in Jesus:
Hebrews 6:4 For it is impossible for those who were once enlightened, and have tasted of the heavenly gift, and were made partakers of the Holy Ghost,
5 And have tasted the good word of God, and the powers of the world to come,
6 If they shall fall away, to renew them again unto repentance; seeing they crucify to themselves the Son of God afresh, and put him to an open shame.
7 For the earth which drinketh in the rain that cometh oft upon it, and bringeth forth herbs meet for them by whom it is dressed, receiveth blessing from God:
8 But that which beareth thorns and briers is rejected, and is nigh unto cursing; whose end is to be burned.
This shows that even Christians, who have repented and become partakers of God's Holy Spirit, can ultimately lose their salvation because of subsequently wrongly employing their free will to "fall away", to commit apostasy, to stop believing (like in Luke 8:13, 1 Timothy 4:1, and 2 Thessalonians 2:3), just as other scriptures show the same thing (John 15:6; 2 Timothy 2:12b, Mark 8:35-38, Hebrews 10:38-39, Matthew 24:9-13).
One way a Christian could be brought to the point where he commits apostasy would be if he finds a particular sin to be very pleasurable, so pleasurable and so fulfilling (in the short term) that he continues in it over time until his heart becomes hardened by the deceitfulness of sin (Hebrews 3:13), to where his love for God grows cold because of the abundance of iniquity (Matthew 24:12), to where he quenches the Spirit (1 Thessalonians 5:19), to where he sears his conscience as with a hot iron (1 Timothy 4:2), to where he begins to listen to the lies of demons and latch onto them, to the point where he departs from the faith (1 Timothy 4:1). In a wrong desire to continue in their lusts without repentance, Christians can reach the point where they're no longer able to endure the sound doctrine of the Bible, and instead seek out and latch onto other teachings which help to support them in their lusts (2 Timothy 4:3-4).
Another way a Christian could be brought to the point where he commits apostasy would be if he has a terror of being tortured and killed during a persecution against Christians, so that during such a persecution he renounces his faith in Jesus Christ and the Gospel in order to avoid being tortured and killed (Mark 8:35-38; 2 Timothy 2:12). Some Christians will fall away in this sense (2 Thessalonians 2:3) during the future Tribulation of Revelation chapters 6 to 18 and Matthew 24 (Matthew 24:9-13, cf. Matthew 13:21, Luke 8:13), when the Antichrist will take power over the earth, make war against Biblical Christians (not in hiding), and physically overcome them in every nation (Revelation 13:7-10, Revelation 14:12-13, Revelation 20:4-6, Matthew 24:9-13).
There will be no way to repent from committing apostasy (Hebrews 6:4-8) and worshipping the Antichrist and his image and willingly receiving his mark on the forehead or right hand, even if this is done just to keep from getting killed (Revelation 13:15-18). Whoever does these things, even if they had been Christians before, will end up suffering punishment in fire and brimstone forever (Revelation 14:9-12). So Christians must be willing to be killed, even by getting beheaded (Revelation 20:4-6), before they would ever do these things (Revelation 14:12-13).
This ties in with the fact a Christian can ultimately have his name blotted out of the Book of Life if he doesn't overcome to the end (Revelation 3:5, Revelation 2:26). An example of Christians ultimately "overcoming" (Greek: nikao, G3528) or "getting the victory" (nikao) (Revelation 15:2) is found later in the book of Revelation, in Revelation 15:2, which refers to those Christians who will be willing to be killed by the Antichrist instead of worshipping him to save their mortal lives during the future, worldwide persecution against Biblical Christians (Revelation 13:7-10, Revelation 14:12-13, Revelation 20:4-6, Matthew 24:9-13). Christians will be able to spiritually "overcome" the Antichrist and Satan by not loving their lives to the death (Revelation 12:11).