If we go on sinning after we have learned the truth, no sacrifice can take away our sins. All that is left is a terrifying wait for judgment and a raging fire that will consume God’s enemies. If two or three witnesses accused someone of rejecting Moses’ Teachings, that person was shown no mercy as he was executed.
What do you think a person who shows no respect for the Son of God deserves? That person looks at the blood of the promise (the blood that made him holy) as no different from other people’s blood, and he insults the Spirit that God gave us out of his kindness. He deserves a much worse punishment.
We know the God who said, “I alone have the right to take revenge. I will pay back.” God also said, “The Lord will judge his people.” Falling into the hands of the living God is a terrifying thing. (Hebrews 10:26-31 GW)
I've seen this passage of text used to discourage and scare people, which tends to bring condemnation. It is a strong exhortation to be sure, but is intended to encourage believers to persevere. This should be clear from the context of this and the following chapter in Hebrews.
Be careful how you handle the truth, "Falling into the hands of the living God is a terrifying thing." ©Word-Strong_2014