No, I prefer exegesis over eisegesis. We need to properly harmonize scripture with scripture before reaching our conclusion on doctrine.
1 Timothy 4:1 - Now the Spirit expressly says that in latter times some will depart from the faith, giving heed to deceiving spirits and doctrines of demons, 2 speaking lies in hypocrisy, having their own conscience seared with a hot iron, 3 forbidding to marry, (reminds me of Roman Catholicism) and commanding to abstain from foods which God created to be received with thanksgiving by those who believe and know the truth. The faith in this context means the apostolic faith, the New Testament apostolic body of doctrines. Some who are in a state of professing adherence to the apostolic faith, nevertheless, will in both doctrine and practice depart from it, giving heed to deceiving spirits and doctrines of demons. Some "nominal" Christians/superficial believers will abandon the Christian faith, the New Testament apostolic body of doctrines for cults or false religions. That does not prove they had saving faith in Christ and were previously born again. (1 John 2:19)
Those who draw back to perdition do not believe to the saving of the soul and those who believe to the saving of the soul do not draw back to perdition. In context, going back to Hebrews 10:26, to "sin willfully" here carries the idea of deliberate intention that is habitual, which stems from rejecting Christ deliberately. This is continuous action, a matter of practice. Now we don't walk along our daily life and "accidentally" fall into a pit called sin. We exercise our will but, the use of the participle clearly shows continuous, willful, continuous action. The unrighteous practice sin (1 Corinthians 6:9-10; Galatians 5:19-21); not the righteous, who are born of God. (1 Corinthians 6:11; 1 John 3:9) Confidence is rooted in the sacrificial death and blood of Jesus, yet those who draw back to perdition and do not believe to the saving of the soul (Hebrews 10:39) demonstrate a lack of full confidence which culminates in a lack of perseverance.
Those who are truly born of God are partakers of the divine nature. (2 Peter 1:4) They have been transformed from pigs and dogs into sheep. The change is more than just cosmetic, as in 2 Peter 2:20.
*These cleaned up on the outside dogs and pigs were never sheep.
Compare 2 Peter 1:4 - "partakers of the divine nature, having escaped the corruption - Strongs #5356 that is in the world through lust with 2 Peter 2:20 - with they escaped the pollutions - Strongs #3356 (different Greek word) of the world through the knowledge of the Lord and Savior Jesus Christ, yet they are again entangled therein, and overcome.
*Notice that 2 Peter 2:20 did not mention them being "partakers of the divine nature." Corruption is deeper than pollutions/defilements on the outside: it is decay on the inside.
Having the knowledge of Jesus Christ does not save a person if there is no heart submission to that knowledge. The latter end is worse than the beginning for these men because rejecting this knowledge will make them more accountable at the judgment. Judas Iscariot is a good example of someone who rejected the knowledge of the Lord and Savior Jesus Christ yet was never saved. (John 6:64-71; 13:10-11)
Well then show me the specific words "lose or lost salvation" in scripture or perhaps the words UN-regenerated or UN-sealed by the Holy Spirit. That would be conclusive proof for your argument. One can fall away from a position they professed to hold after considering the truth for a time, then a hardened heart and departure from God became their final answer. Such people were exposed to the truth and may have even been on the verge of embracing the truth, but they chose to permanently fall away instead. We see this throughout the book of Hebrews. (Hebrews 3:6-14; 4:1-11; 6:4-9; 10:26-39; 12:15) I may decide that I'm going to walk across the Brooklyn bridge and walk right up to the bridge and just before I take one step onto the bridge turn away and depart from the bridge. I don't actually need to be on the bridge in order to depart from it.
The word "IF" in Colossians 1:23, having here the idea of "assuming that you continue in the faith." That is, continuance would show that the person's faith was firmly rooted and established in the hope of the gospel to begin with. Failing to continue demonstrates otherwise.
Just as we see in 1 Corinthians 15:1,2 - Moreover, brethren, I declare to you the gospel which I preached to you, which also you received and in which you stand, by which also you are saved, if you hold fast (demonstrative evidence of faith being firmly rooted and established) that word which I preached to you--unless you believed in vain.
To believe in vain is to believe without cause or without effect, to no purpose. If as some are saying in Corinth, there is no resurrection, then faith is vain and worthless (vs. 14). The people who fail to hold fast to the word (the gospel) that Paul preached in 1 Corinthians 15:1-4, demonstrated that they "believed in vain" (did not truly believe unto salvation in the first place).
All the letters in the NT are written to Christians, but that does not mean that everyone in these large groups of professing Christians are all genuine Christians. Once again, it makes sense that Paul would speak this way because he is addressing groups of people who all "profess" to be Christians without being able to infallibly know the actual state of every person's heart. How can Paul avoid giving them false assurance of salvation here when in fact some of them may not be saved? Paul knows that faith which is firmly grounded and established in the gospel from the start will continue. Those who continue in the faith demonstrate that they are genuine believers. Those who fail to continue demonstrate otherwise.
Nominal Christians outnumber genuine Christians by far in the "professing" Christian world. If you attended a very large church on Sunday and the Pastor greeted the congregation that morning with, "good morning brothers and sisters in Christ" would you automatically assume that everyone who attended church that Sunday morning must be a genuine brother or sister in Christ because of that greeting? The Bible talks about wheat and tares and the tares outnumber the wheat.
Again, there are genuine Christians and there are "nominal" Christians. There are genuine believers and there are superficial believers mixed together throughout the Bible, throughout various churches and throughout various Christian forum sites. If a genuine born-again Christian could lose their salvation, then these verses would be a lie, God forbid. (Psalm 37:28; Proverbs 24:16; John 5:24; John 6:37-39; John 10:27-29; Romans 8:30-39; 11:29; 1 Corinthians 1:13-14; 2 Corinthians 1:22; 2 Corinthians 5:5; Philippians 1:6; Hebrews 7:25; Hebrews 10:10, 14; 1 Peter 1:3-5; Jude 1:1, 24-25)