Correct, provided, "you continue in your faith."
Once you were alienated from God and were enemies in your minds because of your evil behavior. But now he has reconciled you by Christ’s physical body through death to present you holy in his sight, without blemish and free from accusation-if you continue in your faith, established and firm, not moved from the hope held out in the gospel. This is the gospel that you heard and that has been proclaimed to every creature under heaven, and of which I, Paul, have become a servant.
(Colossians 1:21-23)
The problem is not with God, heaven forbid, He will keep us safe and secure in the palm of his hand, PROVIDED we do not lose our faith in Him and become unbelievers i.e. become atheist like Hymenaeus and Alexander who shipwrecked their faith and were handed over to Satan. (1 Tim 1:20)
In Colossians 1:23, the word "if" here is not ean, an unfulfilled, hypothetical condition used with the subjunctive mode, presenting the possibility of a future realization, but ei with the indicative, having here the idea of "assuming that you continue in the faith."
That is, continuance would show that the person's faith is firmly established in the hope of the gospel and they really HAVE BEEN reconciled. The form of this phrase in Greek (using the Greek particle ei and the indicative mood of the verb epimenō) indicates that Paul fully expects that the Colossian believers will continue in the faith; no doubt is expressed, yet what about "nominal" Christians whose shallow, temporary belief withers away?
It's only natural that Paul would speak this way, for he is addressing groups of people who profess to be Christians, without being able to know the actual state of every person's heart. How can Paul avoid giving them false assurance here that they will be eternally saved when in fact they may not? Paul knows that faith which is firmly grounded and established in the gospel from the start will continue. Those who continue in the faith show thereby that they are genuine believers. But those who do not continue show that their shallow faith was not grounded in the gospel to begin with.
Just as we read 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 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 vainand 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).
We don't see the specific words, "lost salvation" in the context of 1 Timothy 1:19. Also, in 1 Timothy 1:20, we read - Among these are Hymenaeus and Alexander, whom I have
handed over to Satan, so that they will be taught not to blaspheme. Now where have we heard that before?
*In 1 Corinthians 5:1-5, we read about a man who has committed sexual immorality by having his father's wife (does that sound like shipwrecked faith? Was it permanent?), yet verse 5 says
deliver such a one to Satan for the destruction of the flesh, that his spirit may be saved in the day of the Lord Jesus. If Hymenaeus and Alexander were truly saved, then how do we know the outcome was not the same for them as it was the adulterer in 1 Corinthians 5:1-5 who later repented in 2 Corinthians chapter 2? Nothing is mentioned about him "losing his salvation" either.