God demands that we stop sinning. We are not to deliberately go on sinning, choosing to do that which we know is against His will. The author of Hebrews warns us that our punishment will be worse than the punishment of those who “set aside the law of Moses” who “died without mercy on the evidence of two or three witnesses.” The witnesses against us, God’s people, are Jesus, the new Covenant, and the Spirit of grace. If we spurn Jesus, who is the Son of God; if we profane the blood of the new Covenant; if we outrage the Spirit, then we will discover that indeed “it is a fearful thing to fall into the hands of the living God.”
The Israelites wander around in the desert for forty years because of their grumbling and disobedience. God continues to feed them His Manna, but He frustrates their plans and prevents them from entering His Sabbath rest. These persons must continue to wander, essentially in circles, with fear, trembling, distrust, self-loathing, and anger. Many die.
“For who are those who hear and yet rebel? Is it not all those who leave Egypt led by Moses? And with whom is He provoked for forty years? Is it not with those who sin, whose bodies fall in the wilderness? And to whom does He swear that they will not enter His rest, but to those who are disobedient? So we see that they are unable to enter because of unbelief.” (Hebrews 3: 16 – 19)
Therefore, today when you hear God’s voice, when He calls you — obey. For it is indeed a fearful thing to fall into the hands of our living God.