One of the most abused passages in the Bible is Hebrews 6:4-6
“For it is impossible for those who were once enlightened, and have tasted of the heavenly gift, and were made partakers of the Holy Ghost,
5 And have tasted the good word of God, and the powers of the world to come,
6 If they shall fall away, to renew them again unto repentance; seeing they crucify to themselves the Son of God afresh, and put him to an open shame.”
This passage is not saying that a person can lose their salvation as some pastors teach. It is speaking about the possibility for an individual to be enlightened. To have the Holy Spirit open their understanding. They may even have an emotional experience; they may walk down the aisle at church in response to a pastor’s invitation to come to Christ. Maybe even said a quick, short prayer asking Jesus into their heart. They may do all the various things that churches and denominations require of them, but they never did what the Bible requires: belief. A true faith in Christ alone, plus nothing, for salvation.
In Mark 4:3-6 we read of a sower casting seed. Some fell by the way side and birds came and devoured it up. Some seed fell on stony ground, where it had not much earth, and immediately it sprang up. But when the sun was up, it was scorched; and because it had no root, it withered away. And some fell among thorns, and the thorns grew up, and choked it, and it yielded no fruit. And others fell on good ground, and increased; and brought forth, some thirty, and some sixty, and some an hundred.” The sower was not planting vegetables. He was sowing the word of God.
What happened to most of the word when Jesus and His apostles were teaching the people of Israel? The Bible tells us that only a small portion took root.
The author of Hebrews is showing how these Jews were very steeped in their religion of works that they were hard to persuade. They heard the Gospel of Jesus Christ, considered it, but in the end most would not believe.
The same thing happened to king Agrippa in Acts 26. The apostle Paul had been witnessing to him via the Holy Spirit. There was conviction going on inside the heart of Agrippa. He almost believed. He said: “Almost thou persuadest me to be a Christian.” He refused the gift of life.
There is an enlightenment that does not lead to regeneration because of unbelief.