He's indicating that he thinks all future sins are already forgiven.
If true, then sounds like we can all resume our old lives of living in sin and still be saved.
All of our sins past, present and future are either forgiven because we are believers or else all of our sins past, present and future are not forgiven because we are unbelievers. (John 3:18; Acts 13:38-39; Colossians 2:13-14) In regard to living in sin, what shall we say then? Shall we continue in sin that grace may abound? Certainly not! How shall we who died to sin live any longer in it? (Romans 6:1-2)
None of which addresses the question the OP has presented.
So it's all good to live in sin then?
Sounds like there's no need for
1 John 1:9 after hearing your take.
It's not all good to live in sin as a Christian and
no one who is born of God practices sin. (1 John 3:9) In this the
children of God and the children of the devil are manifest: Whoever
does not practice righteousness is not of God, nor is he who
does not love his brother. If someone claims to be a Christian yet lives in sin (lifestyle or bent of life) then that person is deceived. (1 John 1:6-10)
Again, in
1 John 1:9, notice that - "If we confess our sins, he is faithful and righteous to forgive us our sins, and to cleanse us from all unrighteousness" (
1 John 1:9) is in
contrast to - If we
say that we
have no sin, (present tense) we
deceive ourselves, and
the truth is not in us (
1 John 1:8) and - If we
say that we
have not sinned, (past tense) we
make him a liar, and
his word is not in us. (
1 John 1:10)
Certain people seem to misunderstand verse 9 to mean that we "must confess each and every sin that we commit as we commit them" (keep a specific inventory of every sin we have ever committed) as an "additional requirement" to "remain cleansed" and "if we forget a sin we are toast!" Who could actually write an exhaustive list of every sin they have ever committed or ever will commit? Sin is not only missing the mark by what we do but also what we fail to do. (
James 4:17)
Believers "confess" (Greek - homologeó) speak the same/acknowledge/agree with God's perspective about their sins and have a settled recognition and ongoing acknowledgment that one is a sinner in need of cleansing and forgiveness in
contrast with saying that
we have no sin or that
we have not sinned. (
1 John 1:8-10)
You can't claim all future sins are already forgiven and then have a problem if someone thinks they can go ahead and live sin without contradicting yourself. If the fancy preachers want to go around making blanket statements such as all future sins are automatically forgiven then there shall be some who actually believe them and go back to living in sin with the expectation that all future sins actually are automatically forgiven.
You seem to be creating a straw man argument. To live in sin is to practice sin and 1 John 3:9 says that
no one who is born of God practices sin. As a Christian, I personally keep short accounts with the Lord in regard to when I stumble and sin because I have a personal relationship with the Lord. (John 17:3) I don't doubt my forgiveness in Christ over not recalling every sin I have ever committed (inventory confession) and making sure that I don't forget to confess each and every one specifically. I do confess to God when I know I have sinned.
The fact f the matter from God's Word is our future sins are not just automatically forgiven. God's Word teaches that if we walk after the flesh we die spiritually and if we do that and don't come back to Him repenting from our sin and ceasing from sin then in the end we would to be saved. The Lord gave us His Spirit to empower us to cease from sin, but nobody seems to acknowledge that too much these days it seems.
You seem to imply that we maintain our salvation through sinless perfection. Romans 8:8 - So then, those who are in the flesh cannot please God. 9
But you are not in the flesh but in the Spirit, if indeed the Spirit of God dwells in you. Now
if anyone does not have the Spirit of Christ, he is not His. 10 And
if Christ is in you, the body is dead because of sin, but the Spirit is life because of righteousness. 11 But if the Spirit of Him who raised Jesus from the dead dwells in you, He who raised Christ from the dead will also give life to your mortal bodies through His Spirit who dwells in you. Romans 8 contrasts true brethren (led by the Spirit) and false brethren (controlled by the flesh) by highlighting their internal nature, mindset, and lifestyle. True believers live according to the Spirit, resulting in life, while "false brethren" follow sinful desires leading to death. If you live in the flesh realm, that proves you're in the flesh, if you mortify sin by the Spirit, that proves you're in the Spirit."
Matthew 13:41,
42 - The Son of man shall send forth his angels, and they shall gather out of his kingdom all things that offend, and them which do iniquity; And shall cast them into a furnace of fire: there shall be wailing and gnashing of teeth.
Descriptive of unbelievers, including make believers. (Matthew 7:22-23; Matthew 23:28)
John 15:1-2 - I am the true vine, and my Father is the husbandman. Every branch in me that beareth not fruit he taketh away: and every branch that beareth fruit, he purgeth it, that it may bring forth more fruit
You are assuming that "in me" (in the vine) must mean saving union with Christ, when scripture instead shows here that outward attachment to Christ that is not inward life. Judas Iscariot was outwardly attached to Christ as the vine, chosen among the twelve, sent out in ministry, yet Jesus said, "Have not I chosen you twelve, and one of you is a devil?!" (John 6:70) He also said, "You are clean, but not all." (John 13:10) Judas was connected outwardly to the vine but never clean inwardly.
John 15 is not teaching that born-again believers lose eternal life. That would make Jesus contradict Himself. He already said,
"All that the Father gives Me will come to Me, and the one who comes to Me I will certainly not cast out." For I have come down from heaven, not to do My own will, but the will of Him who sent Me. 39 This is the will of Him who sent Me, that of
all that He has given Me I lose nothing but raise it up on the last day. 40 For this is the will of My Father, that everyone who beholds the Son and
believes in Him will have eternal life, and I Myself will raise him up on the last day. (John 6:37-40) Jesus also said, "I give unto them eternal life; and they shall never perish" (John 10:28) If they perish, it was not eternal life.
A fruitless branch shows outward connection without inward life. That is why it is taken away. Branches with a vital and spiritual connection with Christ as the vine bear fruit because life is in them. False professors may be attached outwardly for a season, but no fruit exposes no life. Those who profess to know Christ but whose relationship to Him is outwardly attached, Christ neither saved them, nor sustains them. Eventually, the dead outwardly attached fruitless branches are cut off. So, the issue remains simple. The Father removes fruitless professors. Christ does not lose His sheep. John 15 cannot be used to negate John 6 and 10.