Does backsliding mean that a person has to get saved again,does It mean that the Incorruptible seed can be corrupted?
I look at backsliding as a person that is living in sin after confessing Jesus and repenting of their sins knowing God hates sin and does not want us to do it and gives us the Spirit to help us to overcome sin.
Which a Spirit led life will not fulfill the lusts of the flesh, and God will give them an escape from temptations.
So there is no excuse.
But all sin can be forgiven and the backslider can repent of living in sin and be led of the Spirit.
I look at these people as having not abandoned Jesus but are living like the world when they should not.
Living in sin and repenting of the sin when a person does it is not repenting for repenting means turn away from sin and not hold on to sin and then repent when you do it.
Heb 10:26 For if we sin wilfully after that we have received the knowledge of the truth, there remaineth no more sacrifice for sins,
Heb 10:27 But a certain fearful looking for of judgment and fiery indignation, which shall devour the adversaries.
If we sin intentionally knowing the truth that God does not want us to sin then the sacrifice of Jesus cannot wash away that sin until we repent of the sin.
If we live in sin not giving up that sin then the blood of Jesus cannot wash it away for God will not take away a sin we hold on to.
So a backslider is on dangerous ground at the time until they repent and mean it and allows the Spirit to lead them.
But some people say you cannot lose salvation so if this is true then the backslider will always repent and do right and be saved.
But there is no excuse a person can live in sin and still be saved.
God does not like the world to sin and they will be in trouble for it if they do not come to the truth but the Christian can sin and it is alright and they are not in trouble which makes no sense.
Everybody has to repent whether the world or a Christian that sins for everybody has to get rid of sin.
Isa 59:1 Behold, the LORD'S hand is not shortened, that it cannot save; neither his ear heavy, that it cannot hear:
Isa 59:2 But your iniquities have separated between you and your God, and your sins have hid his face from you, that he will not hear.
Luk 9:62 And Jesus said unto him, No man, having put his hand to the plough, and looking back, is fit for the kingdom of God.
It appears a Christian that is backslidden is not fit for the kingdom of God but if they cannot lose salvation then they will always get back in the truth led by the Spirit.