Hebrews 6:1New International Version (NIV)
6 Therefore let us move beyond the elementary teachings about Christ and be taken forward to maturity, not laying again the foundation of repentance from acts that lead to death,[a] and of faith in God,
2 Corinthians 7:8-10Holman Christian Standard Bible (HCSB)
8 For even if I grieved you with my letter, I do not regret it—even though I did regret it since I saw that the letter grieved you, yet only for a little while. 9 Now I rejoice, not because you were grieved, but because your grief led to repentance. For you were grieved as God willed, so that you didn’t experience any loss from us. 10 For godly grief produces a repentance not to be regretted and leading to salvation, but worldly grief produces death.
Psalm 51
A Prayer for Restoration
For the choir director. A Davidic psalm, when Nathan the prophet came to him after he had gone to Bathsheba.
1 Be gracious to me, God,
according to Your faithful love;
according to Your abundant compassion,
blot out my rebellion.
2 Wash away my guilt
and cleanse me from my sin.
3 For I am conscious of my rebellion,
and my sin is always before me.
4 Against You—You alone—I have sinned
and done this evil in Your sight.
So You are right when You pass sentence;
You are blameless when You judge.
Hebrews 10:26-31Holman Christian Standard Bible (HCSB)
Deliberate sin is rebellion. Keep in mind deliberate sin is a continuous rebellion. Not just daily struggle with sin.
Warning against Deliberate Sin
26 For if we deliberately sin after receiving the knowledge of the truth, there no longer remains a sacrifice for sins, 27 but a terrifying expectation of judgment and the fury of a fire about to consume the adversaries. 28 If anyone disregards Moses’ law, he dies without mercy, based on the testimony of two or three witnesses. 29 How much worse punishment do you think one will deserve who has trampled on the Son of God, regarded as profane[a] the blood of the covenant by which he was sanctified, and insulted the Spirit of grace? 30 For we know the One who has said, Vengeance belongs to Me, I will repay,[c] and again, The Lord will judge His people.[d] 31 It is a terrifying thing to fall into the hands of the living God!