In the NT there is a “point of no return.” It is not often thought on, but it does exist.
The coming of the lawless one is by the activity of Satan with all power and false signs and wonders, and with all wicked deception for those who are perishing, because they refused to love the truth and so be saved. Therefore God sends them a strong delusion, so that they may believe what is false, in order that all may be condemned who did not believe the truth but had pleasure in unrighteousness (2 Thessalonians 2:9-12, ESV).
In some respects I can understand why some would not like to think about it; it makes you wonder if you have “blasphemed the Holy Spirit.”
In the OT there was, also, a “point of no return.”
Then the LORD said to me, “Though Moses and Samuel stood before me, yet my heart would not turn toward this people. Send them out of my sight, and let them go! And when they ask you, ‘Where shall we go?’ you shall say to them, ‘Thus says the LORD: “‘Those who are for pestilence, to pestilence, and those who are for the sword, to the sword; those who are for famine, to famine, and those who are for captivity, to captivity.’ I will appoint over them four kinds of destroyers, declares the LORD: the sword to kill, the dogs to tear, and the birds of the air and the beasts of the earth to devour and destroy. (Jeremiah 15:1-3, ESV).
What makes this all the more significant is the appeal the people made to the Lord for relief. The people appealing to the Lord also included God’s prophet Jeremiah. Yes, there is a point of no return, and what did the Hebrews writer say (Hebrews 2:1-4)?