What is wilful sin?
Hebrews 10:26 For if we sin wilfully after that we have received the knowledge of the truth, there remaineth no more sacrifice for sins,
Is this the sin unto death?
1 John 5:16 If any man see his brother sin a sin which is not unto death, he shall ask, and he shall give him life for them that sin not unto death. There is a sin unto death: I do not say that he shall pray for it.
Thanks
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.
Act 17:30 And the times of this ignorance God winked at; but now commandeth all men every where to repent.
2Ti 2:19 Nevertheless the foundation of God standeth sure, having this seal, The Lord knoweth them that are his. And, Let every one that nameth the name of Christ depart from iniquity.
1Co 15:33 Be not deceived: evil communications corrupt good manners.
1Co 15:34 Awake to righteousness, and sin not; for some have not the knowledge of God: I speak this to your shame.
When we confess Christ, and repent of our sins, we should have the understanding that God hates sin, and does not want us to do it, hence the repenting part.
So it is a given that we should not hold unto sin, for God wants us to repent and turn away from sins.
And there is no excuse that a person cannot abstain from sin, for a Spirit led life will not fulfill the lusts of the flesh, for they have crucified the flesh with the affections and lusts.
But some have a form of godliness, but deny the power thereof, ever learning, but never able to come to the truth, and are lovers of pleasures more than lovers of God, and hold unto sin, and think they are alright despite that God says He hates sin.
They say they love Jesus, but do not want to be like Jesus representing good.
But regardless of a person's position they still know God hates sin, and would rather us not do it.
Sin wilfully after we have received the knowledge of the truth, means that we sin on purpose despite that God hates sins, and if we hold unto sin, then there is no more sacrifice for sin, for the blood of Christ cannot wash it away.
And there is many people that engage in sins, and hold unto sin, and think they are alright with God, but then the blood of Christ cannot wash away their sins.
Any person that confesses Christ, and says they cannot abstain from sins is holding unto sin, so the blood of Christ cannot wash their sins away.
Which the Bible tells us of the last generation on earth before Jesus comes back, that they will be pure in their own eyes, but not washed from their filthiness, and the Bible says if any person thinks they stand, take heed lest they fall.
They get relaxed in their walk with God thinking they cannot fall, and are alright, and hold unto sin, but God said they are in error, but the flesh will not let them see that, and they will not let go of all the ways of the flesh.