26 For if we go on sinning deliberately after receiving the knowledge of the truth, there no longer remains a sacrifice for sins, 27 but a fearful expectation of judgment, and a fury of fire that will consume the adversaries. 28 Anyone who has set aside the law of Moses dies without mercy on the evidence of two or three witnesses. 29 How much worse punishment, do you think, will be deserved by the one who has trampled underfoot the Son of God, and has profaned the blood of the covenant by which he was sanctified, and has outraged the Spirit of grace? 30 For we know him who said, “Vengeance is mine; I will repay.” And again, “The Lord will judge his people.” 31 It is a fearful thing to fall into the hands of the living God. – Hebrews 10:26-31 (ESV)
This is one of the passages of “severe warning” found in the Epistle to the Hebrews. It is one of the main sections of Scripture used to teach the erroneous idea that genuine Christians can lose salvation. However, to see this as its interpretation is to misunderstand the passage entirely. It is so important that we rightly interpret these words. With this in mind, I encourage you to listen to these two sermons by Dr. James White:
Sermon 1: If We Go On Sinning Willfully… (Hebrews 10:26-29)
Sermon 2: By Which He Was Sanctified (Hebrews 10:29-31)