If we give up and turn our backs on all we've learned, all we've been given, all the truth we now know, we repudiate Christ's sacrifice
and are left on our own to face the Judgment - and a mighty fierce judgment it will be!
If the penalty for breaking the law of Moses is physical death,
what do you think will happen if you turn on God's Son, spit on the sacrifice that made you whole, and insult this most gracious Spirit?
This is no light matter. God has warned us that he'll hold us to account and make us pay. He was quite explicit: "Vengeance is mine, and I won't overlook a thing," and, "God will judge his people."
Nobody's getting by with anything, believe me.
Remember those early days after you first saw the light? Those were the hard times!
Kicked around in public, targets of every kind of abuse - some days it was you, other days your friends.
If some friends went to prison, you stuck by them. If some enemies broke in and seized your goods, you let them go with a smile, knowing they couldn't touch your real treasure. Nothing they did bothered you, nothing set you back.
So don't throw it all away now. You were sure of yourselves then. It's still a sure thing!
But you need to stick it out, staying with God's plan so you'll be there for the promised completion.