Some believe that once you decide to be saved you can never choose to be lost again, it is irrevocable on your part. When you accept Jesus as your Saviour, it will be the final choice you will ever make about your eternal destiny. If you change your mind later and repudiate your decision, it will be too late, nothing can change it. No matter how deeply and sincerely you desire to be lost and repent of your repentance, you cannot escape from eternal life. No amount of bitter rebellion, deliberate blasphemy, or iniquitous living can change that once-for-all decision to be saved.
Is this what the Bible teaches or could it be that maybe salvation is not predicated upon only one irrevocable act or choice of the past, but upon a continuous, personal relationship of the believer with Christ
Of course like Apostle Paul taught in Galatians 5 about those who do the works of the flesh...
Gal 5:16-21
16 This I say then, Walk in the Spirit, and ye shall not fulful the lust of the flesh.
17 For the flesh lusteth against the Spirit, and the Spirit against the flesh: and these are contrary the one to the other: so that ye cannot do the things that ye would.
18 But if ye be led of the Spirit, ye are not under the law.
19 Now the works of the flesh are manifest, which are these; Adultery, fornication, uncleanness, lasciviousness,
20 Idolatry, witchcraft, hatred, variance, emulations, wrath, strife, seditions, heresies,
21 Envyings, murders, drunkenness, revellings, and such like: of the which I tell you before, as I have also told you in time past, that they which do such things shall not inherit the kingdom of God.
KJV
... one who truly has believed on Jesus, will not be found guilty of doing those things when He returns. And if... they do slip up at times, and do a sin not unto death, and they repent like John showed, Jesus is Just to forgive (1 John 1).
Evidently in many of today's Churches, they don't preach hellfire warnings anymore, but just peace-lovey-dovey hippie type messages which are designed to sooth the ears of those with money in their pockets. Those type preachers will have their reward; they evidently think the world owes them something. Our Lord Jesus called those a 'hireling' in John 10. When the wolves creep in among the sheep those will run, leaving the sheep to be devoured by the wolves. It's because money is what they really care about.
So do you really... think some preacher who wants your money is going to preach to you warnings of hellfire and brimstone from God's Word regarding your actions? No, of course not. He instead wants to know what kind of lollypop you like, and how many flavors! And he doesn't want to mess up your invites to your house for all those free dinners either!
The true Christian should take careful account of what Apostle Paul actually taught. He spent about as much time warning the brethren against falling away to sin after they believed as he did about Jesus Christ having died on the cross for the remission of our sins.