One of the most interesting and challenging sections of all scripture is found in Hebrews 6:4-6…
For in the case of those who have once been enlightened and have tasted of the heavenly gift and have been made partakers of the Holy Spirit, 5 and have tasted the good word of God and the powers of the age to come, 6 and then have fallen away, it is impossible to renew them again to repentance, since they again crucify to themselves the Son of God and put Him to open shame.
A proper interpretation of this section of scripture and in truth the entire epistle requires the understanding that it addresses three distinct groups of Hebrews: 1) believers; 2) unbelievers who were intellectually convinced of the gospel; and 3) unbelievers who were attracted to the gospel and the person of Jesus the Christ, but had not yet reached a decision about Him.
Failure to acknowledge these groups leads to interpretations inconsistent with the entirety of Scripture.
It is the second group that is being addressed in Hebrews 6:4-6. They were intellectually convinced yet spiritually uncommitted. They were enlightened in biblical truth, that was accompanied by intellectual perception… they had even been partakers of the Holy Spirit- probably referring to their participation in the miraculous ministry of Jesus and perhaps the apostles as they were empowered by the Holy Spirit.
But then had fallen away– it is the a Greek term equivalent to Apostasy. They knew the truth… perhaps even believed the truth… but had never actually trusted their eternities to that saving knowledge.
It is impossible to renew them again to repentance… those who sinned against Christ in such a way had no hope of restoration or forgiveness… because they had rejected Him with full knowledge and conscious understanding and experience. They could never have more knowledge than they had when they rejected Him.
There is no possibility of these verses referring to losing salvation.
The entirety of scripture make that unmistakably clear: John 10:27-29, Philippians 1:6, 1 Peter 1:4-5
But perhaps the strongest scripture for that is found in Romans 8:35, 38-39…
35. Who will separate us from the love of Christ? Will tribulation, or distress, or persecution, or famine, or nakedness, or peril, or sword? 38-39. For I am convinced that neither death, nor life, nor angels, nor principalities, nor things present, nor things to come, nor powers, 39 nor height, nor depth, nor any other created thing, will be able to separate us from the love of God, which is in Christ Jesus our Lord.
Saints… Satan wants you to doubt your eternal security. He wants you to live in fear. Christ Jesus does not, He has made it clear: WHEN YOU ARE BORN AGAIN NOTHING CAN SEPERATE YOU FROM THE LOVE OF GOD!!!