Speaking of Jesus as Savior, High Priest and obedient son, Paul writes for our edification, explaining what our understanding needs to be of Deuteronomy 29:29. Some things God withholds, some things He openly displays in His creation for all to see and some things are revealed to those who will diligently seek Him. He is to be sought in simplicity and earnest desire. We must not think that the wonders of God exist simply to satisfy our curiosity. He has with great and specific purpose established every jot and every tittle of His word. There are more things to be said and understood and spoken about the Lord Jesus than it is possible for man to comprehend. And whether it be said simply or profoundly, if it falls upon inattentive ears, it will only achieve a denting of their meager understanding and not a dam bursting break through.
Hebrews 5:11 Of whom we have many things to say, and hard to be uttered, seeing ye are dull of hearing. :12 For when for the time ye ought to be teachers, ye have need that one teach you again which be the first principles of the oracles of God; and are become such as have need of milk, and not of strong meat. :13 For every one that useth milk is unskilful in the word of righteousness: for he is a babe. :14 But strong meat belongeth to them that are of full age, even those who by reason of use have their senses exercised to discern both good and evil.
Having established you, as a true believer, God’s realistic expectation is that you will become the vessel He created you to be. And this of course implies that there are false or untrue believers. The scripture in another place warns that you should beware to not let your flight be in winter (Mark 13:18). Winter is an allegory to a life without the warmth and protection of the Lordship of Christ Jesus.
False believers travel in the winter wasteland of cold religion as thirsty, starving, and without the indwelling Spirit of God which is the seal of promise and down payment of our eternal home in Heaven.
As a true believer, confirmed in your regenerated spirit by the indwelling Holy Spirit of God who cannot be removed, it is a new time. This is the time in which you ought to be able to teach the deep riches of the knowledge of God. Yet because of the slacker and those who lack diligence and those unwilling to profess what they possess, you have not left the kindergarten class of your faith. You are still sucking on the milk bottle when you should be dipping deep into the stew. Until you grow up and gain strength you will be unfruitful for the kingdom and honestly, it makes you relationship suspect. Are you really indwelt?
So Paul leaves the judgment upon those to whom it accurately describes and moves to the foundations which should have by now been firmly established. Seeking perfection in our knowledge and relationship assumes we have established the principles of the One who was first seen in type as the innocent animal; then the King of Salem, the Angel of the Lord and the crucified, risen and coming King. Those fundamental teachings of baptisms, repentance, faith, separation, obedience, and restoration allow us to comprehend the height and depth and breadth of the love of an Almighty God who has personally assumed the satisfaction of the judgment He Himself has levied.
Upon this declaration and establishment of undeniable truth, the Apostle separates those who can believe and receive from those who never will. It is IMPOSSIBLE for those who have come to the true saving knowledge and understanding of God’s grace to be restored if they would ever find themselves able to leave off the believing they have commenced. If the taste of the Holy is within you it is the Holy Himself who has sealed you with an unbreakable seal. God the Holy Spirit has taken residence within and NO spirit or being which He has created has power to eject Him from His chosen dwelling place.
It is not a matter of agreeing with a specific doctrinal position of men but of acknowledging what it means to limit the God of Glory. Is anything too hard for God? Can any man or beast or spirit overcome the creator and establisher of all we know? It does not threaten God in the least to allow His greatest creation the gift and power of free will. Yet that free will does not imply ultimate power. While there is no measure which can confine Him, there certainly is for all His creation whether they be physical or spirit, man or beast. None is able to best Him.
Some see this passage as defining the ability to walk away from God once you know Him, His indwelling Spirit, His glories, His pleasures, His power and His precious grace by having the Blood of His only Son cover your sin. Yet it does not read so.
It says that IF it were possible to walk away, it would NOT be possible to be restored. God refuses to be put to the open shame of saying His finished work on the Cross is not sufficient. He will not go back up on the cross. He will not be your puppet on a string to be resurrected over and over again because of your weakness. His all sufficient sacrifice will not be repeated for it would indicate that it was not sufficient. All references which lead you to believe that it is possible to walk away from Him AFTER you have received Him in truth must be filtered and understood through this passage.
Hebrews 6:1 Therefore leaving the principles of the doctrine of Christ, let us go on unto perfection; not laying again the foundation of repentance from dead works, and of faith toward God, 6:2 Of the doctrine of baptisms, and of laying on of hands, and of resurrection of the dead, and of eternal judgment. 6:3 And this will we do, if God permit. :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.
His salvation is yours to miss or gain but not to lose and recapture. In explaining false prophets and false possessors, Paul instructs the Corinthians in chapter eleven that their role model might be the one who can appear as an angel of light. Paul explains in chapter nine to the Romans that they are not all Israel, which are of Israel. They may say so and act so and perhaps even be convinced that they are so, but if God does not dwell in them they are none of His. Are you?