How can they reject something that they never heard of. It's like what Paul asked the disciples if they received the Holy Spirit since they believed, but they said they never heard their was any Holy Spirit, Acts 19:1, 2. You can't reject or blasphemy against something that you didn't know existed whether you are a Christian or not a Christian. Those who do not believe in Christ even though they have heard the preaching of the Gospel have already damned themselves.
I refer back to Romans 1:19-20, which I've come to realize we just do not give enough credit to.
Everyone has heard of God, in one way or another. God has always revealed Himself. The American Indian sang to the Great Spirit.
Each man has always had the opportunity to believe in God, this is why each man is without excuse. Romans 1:20b
So, I have to believe that REJECTING the Holy Spirit, Who is God, is the U.S.,,,which is blaspheming the Holy Spirit for rejecting Him.
Hebrews 6:4 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.
IF one should fall away, and then want to come back to God...it IS possible. I believe Hebrews 6:4 is taken out of context --- of how Paul (or whoever wrote it) meant this statement.
First of all, yes, Paul probably did not write this epistle.
Secondly, it was addressed to the Jews that had left the religion they knew and grew up with and began to have doubts and wanted to go back to the old ways. This is why it states that they trample Him underfoot,,,verse 29.
Jesus said to forgive 70X7. There is no end to God's forgiveness when we repent and turn away from the evil one. Matthew 18:22
Also, this idea that we cannot repent twice annuls one of the most important parables in the N.T. : The Prodigal Son....who RETURNS to the Father and is found AGAIN. Luke 15:24
This makes a person that has fallen away feel that he cannot return to God... this would be a sad statement indeed.
There are three warnings in Hebrews as the first one found in 2:1-4 is the danger of neglect. The second warning is found in 3:7-4:13 as the danger of unbelief and the third warning in 5:11-6:20 is the danger of not maturing.
The letter of Hebrews 6 is addressed to the Hebrews/Jews as a warning for their need to mature so they would not fall away like the foolish Galatians in Galatians 3:1-3.
The first paragraph is very instructive!
As to the second....I can think of one just off-hand that was very mature and yet fell.