This is a false accusation. It is possible for a Christian to commit apostasy and when that happens it is IMPOSSIBLE to restore them to repentance, so says Heb 6:4-6 (ESV):
4 For it is impossible, in the case of those who have once been enlightened, who have tasted the heavenly gift, and have shared in the Holy Spirit, 5 and have tasted the goodness of the word of God and the powers of the age to come, 6 and then have fallen away, to restore them again to repentance, since they are crucifying once again the Son of God to their own harm and holding him up to contempt.
I suggest that you read accurately what I write.
Oz
Yes sir, this is what Hebrews 6 is teaching.
The book of Hebrews itself, is a theological masterpiece written to the Hebrews showing who Christ Jesus is from the Old Testament, to assure and reinforce to these Hebrews, Whom they are serving, so that in the time of persecution they would be assured, having confidence that they were suffering persecution, for serving the Lord Himself, and not some false messiah.
That they would remain
faithful even unto death, and not fall away from the Lord. [Luke 8:13: Matthew 24:13]
Hebrews 1 gives the back ground... Jesus Christ is Lord. The Lord God.
8 But
to the Son He
says:
“Your throne,
O God,
is forever and ever;
A scepter of righteousness
is the scepter of Your kingdom.
9 You have loved righteousness and hated lawlessness;
Therefore God, Your God, has anointed You
With the oil of gladness more than Your companions.”
10 And:
“You, Lord, in the beginning laid the foundation of the earth,
And the heavens are the work of Your hands. [ A reference to YHWH, The Lord God]
11 They will perish, but You remain;
And they will all grow old like a garment;
12 Like a cloak You will fold them up,
And they will be changed.
But You are the same,
And Your years will not fail.”
Hebrews 1:8-12
Hebrews 2:
2 For if the word spoken through angels [
referring to the Law] proved steadfast, and every transgression and disobedience received a just reward, 3 how shall we escape
if we neglect so great a salvation, which at the first began to be spoken by the Lord, and was confirmed to us by those who heard Him
...
Hebrews 3, sets the foundational context for what the writer goes on to say in Hebrews 6 as well as 10.
Therefore, holy brethren, partakers of the heavenly calling, consider the Apostle and High Priest of our confession, Christ Jesus, 2 who was faithful to Him who appointed Him, as Moses also
was faithful in all His house. 3 For this One has been counted worthy of more glory than Moses, inasmuch as He who built the house has more honor than the house. 4 For every house is built by someone, but He who built all things
is God. 5 And Moses indeed
was faithful in all His house as a servant, for a testimony of those things which would be spoken
afterward, 6 but Christ as a Son over His own house,
whose house we are if we hold fast the confidence and the rejoicing of the hope firm to the end...
12 Beware, brethren,
lest there be in any of you an evil heart of unbelief in departing from the living God; 13 but exhort one another daily, while it is called “Today,” lest any of you be hardened through the deceitfulness of sin. 14
For we have become partakers of Christ if we hold the beginning of our confidence steadfast to the end, Hebrews 3:1-6, 12-14
The Hebrews are warned they must "hold fast" the substance [Hebrews 11:1] they received when they heard the Gospel, steadfast to the end.
This is the same truth Jesus taught in the parable of the Sower, as well as what Paul taught the gentiles.
This is the context from which the writer, continues to warn the Hebrews in Chapter 6, with these words.
4 For
it is impossible for those who were once enlightened, and have tasted the heavenly gift, and have become partakers of the Holy Spirit,5 and have tasted the good word of God and the powers of the age to come, 6
if they fall away, to renew them again to repentance, since they crucify again for themselves the Son of God, and put
Him to an open shame.
7 For the earth which drinks in the rain that often comes upon it, and bears herbs useful for those by whom it is cultivated, receives blessing from God; 8 but if it bears thorns and briers,
it is rejected and near to being cursed, whose end
is to be burned.
Hebrews 6:4-8
Tasted of the heavenly gift, become partakers of the Holy Spirit, which clearly refers to the born again experience.
The Holy Spirit is given to those
who are born again.
Then the parabolic imagery is used.
For the earth which drinks in the rain that often comes upon it, and bears herbs useful for those by whom it is cultivated, receives blessing from God; 8 but if it bears thorns and briers,
it is rejected and near to being cursed, whose end
is to be burned.
....the earth which drinks in the rain... a reference to the believer receiving Holy Spirit.
...and bears herbs useful for those by whom it is cultivated, receives blessing... the believer producing good fruit.
.... but if it bears thorns and briers,
it is rejected and near to being cursed,
whose end is to be burned... the believer who has received the Holy Spirit, but bears bad fruit.
JLB